Auto Meter Features: Digital Auto-Ranging Voltmeter Incl. 15 Second Timer And Fan Override Switch Field Detachable External Volt Leads And Inductive Amp Clamp. Compatible w/6V And 12V Batteries Battery CCA Range - 0-1600 Height: 14.00 Width: 14.00 Length: 14.00 Weight: 25.00 lbs