Automatically power off and restart every 72 hours, which can greatly improve the efficiency of network bandwidth utilization, thereby avoiding network congestion. DC5.5x2.1mm Interface, Male head connect to the power interface of the router/optical modem, Female head connect to the adapter power supply. Support 5V-15V power supply. In theory, it supports all DC5V 9V 12V 15V devices, such as: network routers, Fiber Modem, optical cats, no restrictions on brands. Operation method:1.Connect your router/optical modem/other DC voltage product to this product, and then connect your device power adapter cable. 2.The time to start counting when power is on, the default is 72 hours, fully automatic cycle For example, if you need it to automatically restart at 00:00 every night, then turn it off and on again at 00:00. It will power off/on every 72 hours. Connection instructions: 1. First power-on: indicator light flashes and then enters working state 2. Restart interval: 5s-30s 3. Timing time: start timing after power-on, automatically power off and restart every 72 hours Note: If there is an unexpected power outage during normal operation, the timer will start again after the call Color: Black Material: PVC Package Contents: 4 x Router restart line