【Window Contact Switch】The extractor hood switch set ensures that your extractor hood can only be used when the window is open, no hub/WIFI/Bluetooth required and strong RF signals up to 100 feet indoors offer unlimited possibilitiesfor your smart home life. 【Comprehensive coverage】 Long range up to almost 30 meters indoors, up to 200 meters outdoors (without obstacles).For devices and lighting up to 3600 watts. 【Wide applications】The ASOFTY window contact switch is suitable for extractor hoods, garages, exhaust fans, doors and windows, household appliances.In addition to control, energy is also saved.Example: You can control your extractor hood to only be used when the window is open.Or when you open the garage door, the garage light comes on 【Plug and Play】 The radio-controlled socket and the magnetic contact switch are already paired.Note: 1 AA battery (not included) No lengthy configuration required, easy to use for the elderly, children and people with limited mobility 【Safe and Easy Installation】The ASOFTY exhaust control extractor hood uses high-quality materials, strong flame retardancy.Screw installation or self-adhesive two ways to choose.Pay attention to the appropriate position of the door sensor.