KWS-MX18L 10 in1 Digital LCD Display USB Tester Voltage Current Tester Power Meter Timing Ammeter USB Charger Tester Detector Voltmeter Temporarily store current capacity and energy when is off. Reopen opportunity to accumulate current capacity and energy used. Manual removal if no accumulation is required. U disk current detection, working current of u disk is between 50-100mA, when is exceeds 100mA, u disk may be faulty. Intelligently memory charging capacity, can save mAH input from 9 sets of charging devices after off. Easy to view and check whether charging device’s capacitance is true. USB interface voltage detection, external voltage of USB interface on computer is 5V±5%, output current is relatively constant, generally 500mA, and notebook computer only has 100mA. Contains 9 sets of outage saving functions. Voltage current and capacity display on same LCD screen, no need for cumbersome operations, only need to to USB interface, you can phone’s charging status in real time. Note: If output voltage exceeds allowable charging voltage of electronic product, please stop using or mobile supply. Specifications: Item size: 56.6*24.7*11.2mm Voltage: 4-30V Package size: 14.7*9.4*1.2cm/5.78*3.70*0.47in Capacity: 0-999999mAh Item weight: 13.9g Color: White, Black Charging resistance: 0-999.9 Current: 0-5A : 0-150W Package weight: 17.3g Material: ABS Timing: 0-99 hours Negative voltage: 0-10V Inner temperature: 0-80 Positive voltage: 0-10V Divide into groups: 0-9 group Directions for use: 1: Click button to view 1-9 sets of charging data. 2: Long press button for 3 seconds to remove a set of charging data. 3: Double-click button to rotate screen to view. 4. Long press button and insert USB interface to enter voltage calibration: For example: (1) If display (5.526V→) Then double click button quickly (2) If display(5.528V↑), then you can click button to increase display voltage. (3) Double click button quickly, if display(5.528V↓),then you can click button to decrease display voltage. (4) Then double click button quickly again, if display(5.526V→),then click button one more times, screen will display Current Calibration! system automatically performs current calibration and will automatically return to function home page after calibration is completed. Packing list: 1 x USB Test Meter Contains 9 sets of power outage saving functions. U disk current detection, the working current of the u disk is between 50-100mA, when is exceeds 100mA, the u disk may be faulty. Contains 9 sets of power outage saving functions. Temporarily store current capacity and energy when power is off. Reopen the opportunity to accumulate the current capacity and energy used. Voltage current and capacity display on the same LCD screen, no need for cumbersome operations, only need to connect to the USB interface, you can monitor the phones charging status in real time. Manual removal if no accumulation is required.