Specifications: Voltage: 4-30V Current: 0-5A Grouping: 1-9 groups Time: 0-99 hours Temperature: -5℃~80℃ Power: 0-150W Watt-hour: 0-99999Wh mAh: 0-99999mAh Instructions: Click the button to the saved group data (Time, Wh, mAh). Long press the button for 3 seconds to clear the current single group of saved data (Time, Wh, mAh) Color:Black Material: plastic+metal Package Contents: 1 x USB current and voltage tester Only the above package content, other products are not included. Note: Light reflection 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. Features: 1. Using high-quality materials, the quality is guaranteed 2. Input USB can be inserted on both sides 3. Precise measurement 4. Delicate and size