Garmin
Garmin GNX 21 Marine Instrument w/Inverted Display - 4" [010-01142-10]
Garmin GNX 21 Marine Instrument w/Inverted Display - 4" [010-01142-10]
Labor Day Celebration! Enjoy FREE economy shipping with code LABORDAY-FREESHIP 🎉
Couldn't load pickup availability
Usually ships within 1–2 business days. Estimated delivery 3–7 business days within the contiguous US.
Share
Shipping Policy
Shipping Policy
Shipping Policy
Effective Date: July 14, 2026
At Roam & Harbor LLC ("Roam & Harbor," "we," "our," or "us"), we are committed to getting your order to you as quickly and efficiently as possible so you can spend more time enjoying your next adventure. Whether you're shopping for marine, RV, camping, or outdoor gear, we're here to make your experience as smooth as possible.
Order Processing
Orders are processed the same business day when placed before our daily order cutoff time. Orders placed after the cutoff, on weekends, or on recognized holidays will be processed on the next business day.
Once your order has been processed, you will receive a shipping confirmation email with tracking information.
Please note that processing times may be extended during holidays, promotional events, or periods of unusually high order volume.
Shipping Methods
We offer the following shipping options:
- Standard Shipping
- Expedited Shipping (additional fee)
- Overnight Shipping (additional fee)
Available shipping methods and estimated delivery times will be displayed during checkout based on your shipping destination.
Shipping Rates
Shipping rates are calculated at checkout based on your order, destination, package dimensions, and the selected shipping method.
From time to time, Roam & Harbor may offer promotional shipping offers, including free shipping on qualifying orders. Any applicable promotions will be clearly communicated on our website and during checkout.
Shipping Carriers
To provide the best delivery experience, we ship through a variety of trusted carriers, including national and regional delivery partners. Carrier selection is determined based on your location, package size, and the shipping service selected at checkout.
International Shipping
Roam & Harbor proudly ships to customers around the world.
Please note that international customers are responsible for all applicable customs duties, import taxes, VAT, brokerage fees, and other charges imposed by their destination country. These fees are not included in your purchase price or shipping charges and must be paid by the recipient upon delivery, where applicable.
International delivery times may vary due to customs processing and local postal services.
Order Tracking
Once your order has shipped, you will receive an email containing your tracking number. Tracking information may take up to 24 hours to become active after your shipment has been processed by the carrier.
Shipping Delays
While we work hard to meet all estimated delivery times, shipping delays may occasionally occur due to weather conditions, carrier disruptions, customs inspections, or other circumstances beyond our control.
Roam & Harbor is not responsible for delays caused by shipping carriers or events outside of our reasonable control. We appreciate your patience and understanding should these situations arise.
Lost, Damaged, or Missing Packages
If your package appears to be lost, damaged during transit, or has not arrived within the expected delivery timeframe, please contact our Customer Support team as soon as possible.
Email: admin@roamandharbor.com
We will work with the shipping carrier to investigate the issue and assist you in resolving it as quickly as possible.
Please note that shipping damage and manufacturer defects are handled differently. If you receive a product that is defective due to a manufacturing issue rather than shipping damage, please contact our Customer Support team immediately. We will review the issue and work with you to determine the appropriate resolution in accordance with our Returns Policy and any applicable manufacturer warranty.
Incorrect Shipping Address
Customers are responsible for providing an accurate shipping address at checkout.
If you notice an error after placing your order, please contact us immediately. While we will do our best to update your order before it ships, we cannot guarantee changes once an order has entered processing or has been handed over to the carrier.
Roam & Harbor is not responsible for orders delivered to an incorrect address provided by the customer.
Questions?
If you have any questions regarding shipping, delivery, or your order status, we're happy to help.
Roam & Harbor LLC
Email: admin@roamandharbor.com
Refund & Return Policy
Refund & Return Policy
Returns & Refund Policy
Effective Date: July 14, 2026
At Roam & Harbor LLC ("Roam & Harbor," "we," "our," or "us"), we want you to shop with confidence. If you're not completely satisfied with your purchase, we're here to help. Please review the following policy to understand our return, refund, and exchange process.
Return Eligibility
Most items may be returned within 30 days of the delivery date.
To qualify for a return, items must:
- Be unused, uninstalled, and in their original condition.
- Include all original packaging, manuals, accessories, tags, and components.
- Be free from signs of wear, misuse, modification, or damage after delivery.
Roam & Harbor reserves the right to refuse returns that do not meet these eligibility requirements.
Non-Returnable Items
The following items are not eligible for return:
- Clearance or final sale items.
- Gift cards.
- Hazardous materials or products classified as hazardous for shipping.
- Opened consumable products.
- Any item identified as non-returnable at the time of purchase.
Return Authorization
Because Roam & Harbor works with multiple fulfillment partners and manufacturers, all returns require prior authorization.
Return instructions and the appropriate return location vary depending on the product purchased. Please contact our Customer Support team before sending any item back.
Returns sent without prior authorization or to an unauthorized address may be refused, returned to the sender, or experience delays in processing.
Return Shipping
For standard returns, customers are responsible for return shipping costs.
We recommend using a trackable shipping service and purchasing shipping insurance, as Roam & Harbor is not responsible for items lost or damaged while being returned.
Damaged, Defective, or Incorrect Items
If your order arrives:
- Damaged during transit,
- Defective due to a manufacturing issue, or
- Different from the item you ordered,
please contact our Customer Support team as soon as possible.
To help us resolve your claim quickly, we may request photographs of the product, packaging, shipping label, or other relevant information.
Once your claim has been reviewed and approved, Roam & Harbor will provide a prepaid return shipping label when a return is required.
Depending on inventory availability and the nature of the issue, we may provide one of the following resolutions:
- A replacement product (subject to availability).
- A full refund to your original payment method.
- Another mutually agreed-upon resolution when appropriate.
Exchanges
Exchanges are available only for products confirmed to be defective.
If a replacement product is unavailable, a full refund will be issued to your original payment method.
Inspection & Refunds
Returned merchandise may be inspected by Roam & Harbor or one of our authorized fulfillment or manufacturer partners before a refund or replacement is approved.
Once your return has been received and approved, refunds will be issued to your original payment method within 14 business days.
Please note that your financial institution may require additional time to post the refund to your account.
Original shipping charges are non-refundable unless the return results from our error or an approved defective, damaged, or incorrectly shipped item.
Refused Deliveries & Incorrect Addresses
Customers are responsible for providing an accurate shipping address at checkout.
Orders returned because of an incorrect address, refused delivery, or failure to accept delivery may be subject to the original shipping charges and any return shipping fees incurred by Roam & Harbor or our fulfillment partners.
Manufacturer Warranties
Many products sold by Roam & Harbor are covered by manufacturer warranties.
Manufacturer warranties are separate from this Returns & Refund Policy and remain subject to the individual manufacturer's terms and conditions.
If your issue occurs outside our 30-day return period but falls within a manufacturer's warranty, our Customer Support team will gladly assist you in identifying the appropriate warranty process whenever possible.
How to Start a Return
To begin a return request, please contact our Customer Support team and provide:
- Your order number.
- The reason for the return.
- Photos of the product, if applicable.
Our team will review your request and provide return authorization along with the appropriate return instructions.
Email: admin@roamandharbor.com
Questions?
If you have any questions regarding returns, refunds, exchanges, or warranty assistance, we're here to help.
Roam & Harbor LLC
Email: admin@roamandharbor.com
GNX™ 21 Marine Instrument with Inverted Display - 4"
Marine Instrument with Inverted 4" LCD
- Large, easy-to-read white or color digits on a black background for high visibility in low-light or darkness; choose from 7 customizable backlight colors
- Glass-bonded display with anti-glare lens avoids fogging
- Fully customizable user profiles for sail or power boating to display most important marine and vessel data
- Low power consumption (25 mA) with 350 mW (no backlight)/400 mW (mid-level backlight)
- 5 display configurations plus gauge and graph mode to display depth, speed, wind and 50+ marine and boat parameters
The easy-to-read GNX 21 marine instrument has an inverted display with white or color digits on a black background that clearly shows depth, speed, wind and 50-plus marine and boat parameters. Its glass-bonded display with anti-glare lens coating provides excellent daytime and nighttime readability with high-contrast digits scalable up to 36 mm.
The GNX 21 is the first glass-bonded marine instrument with a combination of directly driven LCD segments and a dot-matrix field to display graphical information. Its low power consumption - (25 mA) with 350 mW (no backlight)/400 mW (mid-level backlight) - is perfect for use on sailboats, and provides a valuable instrument for cruising and fishing. Fully customizable user profiles display wind, depth and speed data. Plus, the GNX 21 includes an auto-scroll feature that rotates through data screens for hands-free operation. It can be installed with the included low profile flush mount or an optional flat mount for the ultimate glass helm solution and custom look for your boat.
Easy-To-Read Display
Unique high-contrast hybrid display features large, easy-to-read digits scalable up to 36 mm tall. Offers excellent clarity in direct sunlight, at dusk, or at night. The dot-matrix section can show additional details and/or graphical information.
Glass-bonded Display
Glass-bonded display helps prevent fogging, and the anti-glare lens finish increases visibility.
Customizable Color Digits
Choose from 7 different backlight colors, or even create a customized color, to achieve the screen that provides optimum readability for you.
Customizable User Profiles
Fully customizable user profiles allow you to choose from 5 available display configurations for sailboat or powerboat user-profiles: single, dual and triple function, plus gauge and graph mode to display wind, depth and speed data, or customize the pages to display the marine and boat data that is most important to you.
Auto Scroll
Set your display to automatically cycle between pages at a speed you set for convenient, hands-free operation.
Low Power Consumption
Perfect for sailors who want to sail for long intervals without having to run a motor or generator to charge batteries. The GNX 21 uses only 25 mA with 350 mW daytime usage, requiring no backlight and just 400 mW with a mid-level backlight setting at night.
NMEA® 2000
Monitor more than 50 marine and boat parameters, including GPS speed, water depth and temperature, wind direction, and wind speed from the NMEA 2000 bus. You can also add a NMEA 0183 device using the optional 7-pin bare-wire power/data cable.
In The Box
- GNX 21
- Trim piece snap cover
- Protective cover
- Flush mount gasket and hardware
- NMEA 2000® T-connector
- NMEA 2000 drop cable
- Installation instructions
- Documentation
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Specifications:
- Shape: Square
- Screen Size: 4"
- Instrument Function: Multifunction
- Box Dimensions: 5"H x 9"W x 10"L WT: 2.95 lbs
- UPC: 753759120962
Owner's Manual (pdf)
Brochure (pdf)
