Features: The USB 3.0 Tester is essential tool for monitoring and analyzing the power delivery of your USB devices, ensuring performances and safety. Featuring a 0.96inch lcd display, this multimeter provides clear and accurate readings of voltage, current, power, capacity, energy, and temperature with a wide viewing angle. Suitable for enthusiasts, electronic hobbyists, and digital gamers, the USB Power Meter is for anyone on maintaining their gadgets' health. Use this USB Current Meter Tester in your home office, or electronics lab to measure and manage the efficiency of charger, and other USB power equipment. With its quick charging recognition, ensures you're inform about device charging status. Specifications: Component:ABS Measuring voltage: 3.7V-30V Measuring current: 0-4A Size:Approx.64x22mm/2.52x0.86inch Package Includes: 1Pc USB 3.0 Tester note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.