Brand new and high .It can be very easy to find digital device charging problem. Compact and easy to carry, no additional power supply, plug and play. It can easily measure the output voltage of the USB port and the device operating current or load voltage. Detect any USB charger such as PC USB, home charger, car charger. Suitable for factories, labs and personal product. Specification: Internal resistance: 0-999.99 Power: 0-150W Voltage: DC4-30V Current: 0-5A Counting time: 0-99 hours Delay time: 0-24 hours Test content: USB voltage, current, power, capacity, electric , timing and etc. Electric : 0-999.9WH Dimensions: 75x25x13mm/2.95 x 0.98 x 0.51 inch() Material: plastic colour: White Package Contents: 1 x Usb Tester Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.