The USB Power Tester offers a clear, practical solution for checking USB charging performance. It is designed for simple, hands-on use with no extra equipment required. Key features and benefits - Reset button for easy screen clearing: Press and hold the reset button for 3-5 seconds to clear the display and start fresh readings. - Easy measurement of USB output and device current: Quickly view the operating current of the USB port output and the current drawn by connected devices. - Compact and plug-and-play: Small size requires no external power supply or additional accessories. Simply plug in and start testing. - USB charger recognition: Detects the output voltage and current standard of the USB charger, helping you verify compatibility and performance. - Purpose built for USB power assessment: Use it to measure and evaluate USB power delivery and charging performance. Use scenarios - Verify chargers and cables: Check whether a charger or cable delivers the expected current and identify any bottlenecks or poor connections. - Assess device charging: Monitor how a phone, tablet, or other USB device behaves during charging to determine real-world power performance. - Test power sources on the go: Evaluate power banks, car USB adapters, and USB hubs to ensure they provide correct voltage and current for reliable charging. This device provides a straightforward, trustworthy way to understand USB power transfer and charging behavior without extra setup or accessories.