The product has never been used, the packaging was damaged during transport. Unopened product, repacked in our warehouses, in perfect working condition, warranty available. 1. A wireless switch without a battery. In the absence of a battery or Wi-Fi, simply press the control panel to convert the kinetic energy of your finger into electrical energy and send a 433 MHz wireless signal to the receiver to turn the light on or off. 2. High quality: Our doorbell transmitter has been tested by professionals. Its lifespan can reach 800,000 activations, which far exceeds the industry average. 3. The control panel is easy to install and requires no rewiring. Simply connect the receiver to the live and neutral wires of the desired lamp and press the control panel to turn the lamp on and off. We have customized the product code at the factory, which avoids confusion and allows you to use it immediately (the original wall switch must be on). 4. A battery-free wireless switch with powerful RF signals, which can transmit powerful RF signals through walls and doors to control lighting within a range of approximately 30 meters indoors (100 meters outdoors). Metal doors can mask signals and prevent intrusion. It is ideal for controlling lighting in homes, garages, outdoor lighting, and gardens. 5. Create your own wireless switch system, which can control one receiver with multiple control panels, such as those on the stairs, entrance, and bedside table. Multiple control panels are required to control the lighting. Different wireless switch kits do not interfere with each other or cause cross-switching, creating a perfect lighting control system for your home. 6. Waterproof battery-free wireless switch. Thanks to the milliampere power supplied by the control panel, it can even be used in humid environments such as bathrooms and terraces. Simply press the control panel to remotely control indoor lighting, ceiling lights, chandeliers, fixtures, hard-to-reach lights, and other appliances. 7. Wide voltage receiver: 110-250V AC (suitable for use in most countries worldwide). Small receivers are easily installed in control boxes such as ceiling lights, junction boxes, and switch boxes. Rated power: 10A.