8 Stk Nye RF433MhZ Trådløse Dør og Vindues sensorer Specifications: BrandDIGOOType433MHz New Door Window Alarm SensorVoltage3V Button Battery CR2450 Under Voltage Monitoring7.5 V+/-0.5VStatic Current<=10uATriggering Distance>20mmEmission Current<=15mAEmission Distance>=120 m (Open area)Emission Frequency433MHzWorking Temperature-10? ~50 ?Convenient FunctionSimply put it any please you want in your home :) ( such as door, window, drawer, wardrobe, bath etc) When someone pass it by, it will alert you on the phone App.