2 ways on/off control switch 220v digital wireless wall light receiver transmitter remote

remote control indoor distance is about 8-15m, about 20 meters in the open area (depending on the specific use environment). the light remote control of relay 7a just can be used for lighting products. fast and easy installation to replace the old or broken one. every set of remote control switches has independent coding, and multiple sets in the same room do not interfere with each other. perfect for remote controlling or droplight, crystal light, modern low-pressure light, absorb dome light, day flower light, fluorescent light, energy-saving lights, exhaust fan, led light etc..syi