DC 4-30V LCD USB detector, voltmeter, ammeter, power bank charger capacity tester, voltage and current meter, charging monitor.

DC 4-30V LCD USB Voltage and Ammeter Power Bank Charger Capacity Tester Voltage and Ammeter Charging Monitor DC 4-30V LCD USB Voltage and Ammeter Power Bank Charger Capacity Tester Voltage and Ammeter Charging Monitor Product Highlights: 1. Simultaneously displays voltage and current (mAh) data, easy to read, can detect power bank output (mAh) 2. Supports multiple sets of test data retention, power outage save function does not affect data transmission 3. Higher accuracy, current parameter does not jump, current sampling loss is basically less than 25mΩ 4. Features precise current calibration for higher current accuracy. 5. Safe charging with real-time monitoring and control of your charging data. Main parameters: Input voltage: 4-30V Voltage resolution: 0.01V Test current: 0-3A Current resolution: 0.01A Capacity range: 0-19999mAh Accuracy: ±1% Line loss: Approx. 0.1Ω Package list: Voltage and current meters * 1