Features: 433Mhz rf wireless Relays remote control Switches.Stable and reliable performances with high reception sensitivity (> 97dBm). Radio frequency signal transmission.Strong signal can pass wall, floors, doors,board and so on. It can be controlled more than 200meters distance with no obstacle. The codes of the chip is FSK learning code which making the remote control system more security. Take control of up to 12 devices with this universal remote Switches designed to resist interference. Crafted from durable ABS material, this universal remote Switches ensures reliability for long term use. Can be used in homes, farms, factory, offices, laboratories, supermarkets and so on.You can remotely operate every device connect with the Relays receiver through the remote control. Manage your lights, appliances, and more with ease using this versatile universal remote Switches, suitable for various settings. Specifications: Material:ABS Transmitter Distance:>200meters Transmitter Working Voltage:DC3V 2pcsAA Battery (not included) Mediation Methods:FSK Receiver Working Voltage:AC175-380V,DC175-380V (optional) Frequency: 433MHZ Transmitter Size:Approx.231mm/9.09''x57mm/2.24''x40mm/1.57'' Receiver Size:Approx145mm/5.71''x91mm/3.58''x40mm/1.57'' Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set Wireless Remote Control Switches