Safe-T-Alert FX-4 Carbon Monoxide Alarm [FX-4] Automotive/RV | Lighting The S3166s has the most

The S3166s has the most advanced optics available on the market

Includes 911339 base and 9-watt wedge base lamp

Mounting: #8 Screw (M4) or #8 Nut

USB Mini-B cable

Speedometer (60 MPH) (Mechanical)

Safe-T-Alert FX-4 Carbon Monoxide Alarm [FX-4] Automotive/RV | Lighting The S3166s has the mostFX 4 Carbon Monoxide Alarm 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