Usage Tips: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 3S to reset watt hours and watt hour data to zero. 5. WIDE APPLICATION: The DC ammeter can detect voltage, current, power, timing, temperature, capacity, capacitance and so on. 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