Feature: 1. When the multi‑function current and voltmeter is measuring, the circuit takes power from the power input port, and no additional power cord is required. 2. The LCD screen display can display information such as voltage, current, power, discharge mAH, discharge time and working temperature. 3. The protection mechanism is complete, with under‑voltage protection, overvoltage protection, overcurrent protection, overpower protection, overtemperature protection, overtime protection and overcapacity protection. 4. By setting appropriate undervoltage protection and overvoltage protection thresholds, the battery overcharge and overdischarge control functions can be realized. 5. Timed and quantitative battery charging and discharging can be realized by setting appropriate overtime protection and overcapacity protection thresholds. Specification: Condition: 100% Brand New Item Type: Multifunction Volt-Ammeter Material: Plastic Housing Product Size: Approx. 79 x 42 x 26mm/3.1 x 1.7 x 1in Model ZK-U15 Input Voltage DC 5V-38V(With Anti-Reverse Connection) Input Current 0.03A-5.00A Operating Current