12-24 Volts DC Low E.S.R. Digital DC Volt Meter 0/4 Gauge Power Wire Inputs 0/4 Gauge Power Wire Outputs Increased Dynamic Sound Range of your amplifiers Reduces DC Voltage Spikes on your Vehicles Compact Size DIMENSIONS: Dimensions L 9.76″ (24.8cm) x W 5.43″ (13.8cm) x H 1.9″ (4.8cm)