Provides early battery failure warning for "piece of mind" Displays the voltage as engine is running to warn of charging issues Visual and audible alarms for performance and low/overcharge voltage issues Displays % battery life remaining, lost starting ability, and voltage 6 feet of cable for convenient mounting to see and hear warnings Fast and easy installation Audible alarms for recharge and replace battery Works on all "wet" and AGM/Spiral SLI 12 volt powersport engine start batteries Uses patented CrankCheckTM technology 2" high x 2" wide x 1/2" deep, waterproofed to IPX 5 standards Minimal power draw-less power than a digital dashboard clock 1 Year warranty from manufacturer defects