Product Review

Unacceptable voltage and current output from the computer, USB wall/car charge will do great damage to your mobile device. Now here is DROK OLED Digital multimeter to help you have a better understanding of your power source, USB charger cable. PARAMETERS: Voltage range: DC3. 7-13V Voltage accuracy: (0. 2%+1 words) Current range: DC0-3A Current accuracy: (0. 8%+3 words) Capacitance range: 0-99999mAh Power range: 0-39W Energy range: 0-999Wh Capacitance resolution: 1mAh Energy resolution: 1mWh Static consumption: about 10mA Display screen: 0. 91" OLED screen OUTSTANDING FUNCTIONS: 1. Mode selection: Press the key to choose among direct mode, quick charge mode and disconnected mode. 2. Over-voltage & under-voltage alarm: When voltage is higher than 5. 3V or less than 4. 7V, it shows an arrow to inform you of over-voltage/too-low voltage. And the arrow will not stop flashing until voltage is within normal range. 3. Current zero calibration: The USB meter might have larger testing error in terms of small current due to aging components and changing environment. To deal with such case, you need to have this meter done the current zero calibration. 4. Screen rotation: Long press the KEY for about 4sec and LED will light on, then release it when LED light off, in this way, its display screen will rotate. 5. Screen closing: Long press the KEY for about 6sec and release it later to close the display. 6. Capacity unit switch: Press the KEY for about 4sec and release it when LED light on and later light off, then you can choose to display capacitance in mAh or mWh. ORDER NOW! Hurry to adding it to your cart.