Detects and alerts when it senses movement using sound, text or light depending on the set scenario. Easy to install and allows for remote accessibility as well as connection to Calex App. Can be used in conjunction with other appliances and Calex accessories, enabling to switch connected devices on/off when entering or leaving a room (sold separately). Each sensor is supplied with 2 x AAA batteries. Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 25m Wireless Range IP20 Rating Internet Connection Required Works with - Amazon Alexa - Google Home - iOS App - Android App Tamper Alert 25m Wireless Range IP20 Rating Internet Connection Required