Feature: 1. MEASURING RANGE: This ampere voltage multimeter can measure 8-120V with direct power supply and 0-200V with external power supply. The current and voltage can be calibrated manually. 2. COLOR LCD SCREEN: The DC ammeter is displayed on a full view color LCD screen for clear readings. 3. DURABLE MATERIAL: The digital voltmeter is made of ABS plastic case, which is wear resistant, drop proof and sturdy. 4. EASY TO OPERATE: Click the menu button on the panel of this LCD ammeter to use amp hours and watt hours. Long press 3 seconds to reset watt hours and watt hour data to zero. 5. WIDE APPLICATION: The DC ammeter can detect voltage, current, power, timing, temperature, capacity, and capacitance. Specification: Item Type: DC Digital Voltmeter Ammeter Material: ABS Color: Black Interface: Wired Features: Can measure various DC voltages and currents. Package List: 1 x Tester 3 x Connecting Wires 1 x 100A Shunt 1 x User Manual