Features: Size: 60*26mm; USB:QC fast charging; Voltage range: 4-30V; Current range: 0~6.5A; Whether to support timing test: 0~990H; Battery capacity test: 0~99999mAH; Power: 0-195W; Other functions: automatically save data when power off (save data 30 seconds). 1. Safe charging, real-time control of charging data. Capable of testing accurate voltage and current readings and providing information in color: battery capacity, testing time.; 2. Accurate range, high precision, stable and reliable performance, strong anti-interference ability. 3. The color display has high brightness, large font, clear and easy to read. 4. The USB power meter has a power-off storage function, which is convenient for viewing. Instruction 1. The input end is connected to the USB output port of the charger; 2. The output end is connected to the USB port of the data cable; 3. Press and hold the reset button on the side for 3 seconds and the screen will be cleared. The USB tester is small in size and can detect USB charger output voltage and current just by plugging it in. USB voltage meter are useful for differentiating between good charging cables, the capacity of a battery, the amount of power a stand-alone system is draining, and more. The usb cable tester can measure USB interfaces, such as mobile phone, U disks, power bank, 3C digital, PC, laptop, desktop computer, discharge loads, car charger, cable, etc. NOTE: Please pay attention to its screen orientation when plugging in the USB tester. If the display will be at an invisible angle when plugged into a charging source, you can use a USB extension cable. Specifications: Model: KWS-V30 Material: ABS Color: White Voltage: DC4-30V Current: 0-6.5A Minimum Test Current: 0.02A Timing: 0-990 hours Power: 0-195W Milliampere-Hour: 0-99999Mah Watt-Hour: 0-195W Item Size: 60 * 26 * 13mm / 2.36 * 1.02 * 0.51in Item Weight: 18g / 0.63oz Package Weight: 20g / 0.71oz Package Size: 11.5 * 7 * 2cm / 4.53 * 2.75 * 0.78in Package List: 1 * USB Tester