TV-M Trailer Vision Charge Guard Low Battery Monitor

TV-M TRAILER VISION CHARGE GUARD LOW BATTERY MONITOR 

Trailer Vision Charge Guard Low Battery Monitor for Caravans & Trailers

** This Trailer's Breakaway Battery must be constantly charged by the towing vehicle and a Visual or Audible Device fitted to warn the driver of the Towing Vehicle from the normal driving position if the trailer's battery charge fails.