Self-powered: The kinetic radio switch requires no batteries. Simply press the switch and generate safe and environmentally friendly kinetic energy. Please note that this switch panel must be paired with the receiver after installation before use. Range and use: The effective range between the transmitter and receiver is approximately 30-50 meters indoors, and outdoors approximately 160-200 meters. One receiver can be connected to multiple switches. Ideal for conveniently controlling your garden shed or outdoor lighting from home. No power cable, plug and play: No outlets or junction boxes required. Wireless operation without drilling or screws. Can be mounted with adhesive tape or simply screwed on. Ready to use in minutes. High quality and safety: The smart wireless switch uses premium flame-retardant PC material, resistant to high temperatures, deformation, and discoloration. Built-in tamper protection. Parents and children can use it with confidence. 【Durable and guaranteed】Ultra-thin design. Lifespan: up to 25 years and up to 100,000 keystrokes.