[Wireless Motion Sensor Alarm]Includes 1 receivers and 2 transmitters, with 3-7m/ 9.8-22.9ft effective detection range, 120 detection angle, can effectively detect movement in surrounding areas and trigger alert to the linked receiver.[Large Wireless Transmission Distance]Signals with b penetration force can be sent to the receiver more than 200m/ 656ft away to warn you, providing security for your property and loved ones.[IP52 Waterproof]With large waterproof cover and deepened groove, no fear of rainy days, suitable for outdoor use, widely applied in front doors, window frames, driveways, walking paths, shops, garage, and more.[38 Chimes Optional]There is always one chime you and your family love with built-in high-quality speaker, low power consumption, 4 levels of adjustable volume, no worry of that you can't hear the ringing.[Power Supply]The receiver can be easily plugged into a standard outlet inside your home, and the transmitters are powered by 3 x AAA batteries (not included), convenient for placing them at the entrance to your driveway.Specifications:Color: BlackMaterial: ABSDetection Angle: 120Detection Range: 3-7mTransmission Range: 200m (without obstacles)Frequency: 433MHzRinging Tones: 38Power Supply of Transmitter: 110-240V plugPower Supply of Receiver: 3 x AAA batteriesTransmitter Size: 8.5 x 8 x 2cm/ 3.3 x 3.1 x 0.78inchReceiver Size: 8 x 8 x 5.5cm/ 3.1 x 3.1 x 2.1inchPackage List:2 x Transmitter1 x Receiver