Pay in installments of $31.75 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
For Your Every Summer RSVP, with Code: SUMMER15
Description
Safe-T-Alert FX-4 Carbon Monoxide Alarm - 2-Pack [FX-4MARINE2-PACK]FX 4 Carbon Monoxide Alarm 2 Pack Marine Use Low Voltage Hard Wired Alarm. Replaces your CO alarms that are over 5 years old. No Bags. No Tags. Full 5 Year service life, longer than CO Sentinel CMD 4M alarms. CMD 4M and CMD 3M that have reached end of life. Features: Conforms To ANSI UL STD 2034 Marine Meets ABYC A 24. NMMA Listed Component Most Reliable Boats DC electrical system or marine grade batteries supply power to the alarm No missing or dead
![Safe-T-Alert FX-4 Carbon Monoxide Alarm - 2-Pack [FX-4MARINE2-PACK] Safe-T-Alert FX-4 Carbon Monoxide Alarm - 2-Pack [FX-4MARINE2-PACK]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/75682XL.jpg?v=1643840767)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 965 reviews
Sort
Product Reviews
★★★★★ 5
Fits perfectly
Good build quality and great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Perfect fit
Perfect fit, easy to install worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Fits a 2008 Honda CRV.......
Simple product that works great. I think the vehicle is running much better since I replaced the filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
★★★★★ 5
Perfect fit, great quality
Fit my Honda CRV with no issues. Pretty easy to install and so much less money than dealer or oil change places
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
★★★★★ 5
Exactly
Buena calidad
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 17, 2025
![Raymarine ST-Ng (M) to DeviceNet (F) Adapter [A06082]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/76131XL.jpg?v=1643843212)

![GROCO ARG-753 Sight Glass Fits ARG-750 [ARG-753]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/76043XL.jpg?v=1643842790)

![SmartPlug BM50 Male Inlet Parts Kit [PKM50]](https://cdn.shopify.com/s/files/1/0611/7297/3739/products/76168XL.jpg?v=1643843450)