ELM327 Bluetooth WiFi V1.5 HH D1 OBD2 OBD-II Car Auto Diagnostic Scan Tools£» Features£º This product can measure voltage on USB powered devices, empty load, the voltage and current of USB terminal equipment at work. Current and voltage display cycle, use is simple and convenient and practical. Compact and easy to carry, without additional power supply. Specification£º Detection range: Voltage: 3.5V-7.0V error 0.1V Current :0A-3A error 0.01A Resolution: voltage 10mV, current 1mA Error: voltage < ¡À 1%; current < ¡À 2% The full-scale voltage: 200mV (current measurement) Operating temperature: 0-60 degree Package Content£º 1 X USB current / voltage tester