Litong 0.6" LED 6-Digit USB Power Charger Voltage Current Tester w/ Circuit Recognition
1. Resolution: - Voltage: 10mV - Current: 10mA - Working temperature: 0-60'C - Error: 1% 2. Circuit identification switch: - A = Apple Circuit - D = data transmission - S = Samsung Circuit 3. Note: necessary to first switch to the S / D / A stall and then connect your phone to be effective. You can not connect the phone to dial switch that is invalid