JUWEI J7B LED Display USB Power Charger Current Voltage Tester / Protector / Monitor - Grey + Silver
Capacity Tester: click the button for 0.5s or less enter to view the data view switch; Built-in speakers and real-time monitoring of electronic protection switch high voltage low voltage over-flow audible alarm and automatically shut off the output protecting your equipment; Operating Current: <20mA; Current Resolution: 0.01A voltage resolution: 0.1V; Rate: 500mS / times; Precision: voltage< +/- 1% current: < +/- 2%; Temperature: -10~65'C; Pressure: 80~106kPa.