[Integrated insole design] Independent product experience, the insole adopts integrated design, that is, all modules of heating film, battery, wireless charging board, sensor temperature, Bluetooth master, etc. ". All of them are integrated into the insole, product independent use experience. When the user uses it, it is like a pair of independent insoles, its [Safety] We use 3.7-4.2V low voltage lithium battery heaters, which will not cause harm to human body. The strong protection and pressure-resistant protective shell can withstand 300kg. Rest assured to use professional charging protection chips, overload protection and special battery discharge and charge protection circuit [Load recognition] Automatically start and stop heating, built-in load recognition circuit, real-time recognition of the state of charge, automatically start and stop heating according to the state, when the product is on charge, stop the unloading state of the heater, and start heating. [Ten-level temperature adjustment] 41-50 degrees seamlessly adjust the precise setting of the heating temperature. Sliding bar operation, temperature feedback, integrated temperature acquisition sensor, acquisition mode intelligent real-time for temperature control Size: Small size 36-40 [Wired charging card] Can be controlled by VX / APP