Wireless Motion Sensor Alarm Includes 1 receiver and 2 transmitters, with a 3-7m (9.8-22.9ft) effective detection range and 120-degree detection angle. It can effectively detect movement in surrounding areas and trigger an alert to the linked receiver. Large Wireless Transmission Distance Signals can be transmitted up to more than 200m (656ft) away to the receiver, providing security for your property and loved ones. IP52 Waterproof Design Equipped with a large waterproof cover and deepened groove, it is resistant to rain and suitable for outdoor use. Ideal for front doors, window frames, driveways, walking paths, shops, garages, and more. 38 Chime Options Choose from 38 built-in chimes to find the one your family prefers. Features a high-quality speaker with low power consumption and 4 levels of adjustable volume, ensuring the sound is audible when needed. Power Supply The receiver can be plugged into a standard indoor electrical outlet. The transmitters are powered by 3 x AAA batteries (not included), allowing flexible placement at locations such as driveway entrances. Specifications: Color: Black Material: ABS Detection Angle: 120 degrees Detection Range: 3-7m Transmission Range: 200m (without obstacles) Frequency: 433MHz Ringing Tones: 38 Power Supply of Receiver: 110-240V plug Power Supply of Transmitter: 3 x AAA batteries Transmitter Size: 8.5 x 8 x 2cm / 3.3 x 3.1 x 0.78 inch Receiver Size: 8 x 8 x 5.5cm / 3.1 x 3.1 x 2.1 inch Package List: 2 x Transmitter 1 x Receiver