USB 5V Adjustable Timer PowerOff Control Cable Adjustable Countdown Timer: Set automatic poweroff from 5 minutes up to 24 hours and 55 minutes, giving you precise control over device run time to save energy and prevent overuse. Digital Display for RealTime Tracking: Builtin screen shows the countdown and progress clearly, so you can monitor remaining time at a glance. Simple and Convenient Operation: Plugandplay design supports 5V 2A power supply. No installation or software required. Compact and Portable: Small, lightweight 40 cm cable is easy to carry, store, and use anywhere. Power Control Only: Designed for power delivery without data transmission, ensuring stable and reliable operation. Practical applications: 1. Automatically cut power to USBpowered LED lights after a set time to extend lifespan and save energy. 2. Schedule poweroff for USBpowered fans to avoid overnight usage and reduce electricity waste. 3. Control charging time for mobile devices or power banks to prevent prolonged overcharging. Ideal for anyone needing precise, timed power control for 5V USBpowered devices, at home, in the office, or on the go.