QZ-TE30 power supply system is M30 knapsack system, and the console of the tethered box is equipped with LED lighting system, with built-in mosquito repellent lamp; The tethered box provides a folding function that can be used when the ground is unfurled protect the tethered box by avoiding contact with the harsh ground environment;The box can be designed as a backpack. The material of the box is made of environment-friendly materials. The joint with the back of the body conforms to ergonomic design and is comfortable durable, suitable for individual long distance carrying. While high integration provides portability, the automatic take-up and pay-off function of 55m cable can also ensure the rapid deployment and return of the tethering system.It is an effective device to protect cables by reducing the impact and bending of cables.