This practical USB tester enables to detect voltage, current and capacity, show their data values clearly on one screen, offers charging safety to protect your devices. It is widely applied in power bank, computer, wall charger, mobile phone, laptop, etc. Features: Reliable: Adopt durable ABS shell and selected electronic components, for long-lasting and excellent performance. Easy-to-use: Press "RESET" button for 3-5s to clear the data on screen; easy to operate. Accurate: Voltage and current measurement accuracy reaching ˇL”1%. Practical: Monitor charging status of appliances, for safe and secure charging. Readable: Show real-time data values of voltage, current and capacity on LCD screen; clear at a glance. Specifications: Material: ABS Color: Blue, Grey Optional Voltage: 4-20VˇL”1% Current: 0-3AˇL”1% Time: 0-99 hours Capacity: 0-99999mAh Item Weight: 18g / 0.63oz Item Size: 7.2 x 2.4 x 1.3cm / 2.83 x 0.94 x 0.51in Package Weight: 20g / 0.70oz Package Size: 12 x 7.5 x 1cm / 4.72 x 2.95 x 0.39in Note: USB tester only, other accessories in the picture are not included. Due to manual measurement, there may be deviation. Due to lighting or other reason, the picture and material object may slightly differ in color, please in kind prevail. Packing List: 1 x USB Tester