Features: 1. Made of high-quality materials, ensuring reliable quality 2. Input USB can be inserted from either side 3. Accurate measurement 4. Compact and finely crafted 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: Press the button to access the saved group data (Time, Wh, mAh). Long press the button for 3 seconds to clear the saved data of the current single group (Time, Wh, mAh) Color: Blue 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 item's color to appear slightly different from the actual product. The allowed measurement error is +/- 1-3cm.