[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 with strong penetration can be transmitted up to 200m (656ft) away to the receiver, providing enhanced security for your property and loved ones. [IP52 Waterproof] Designed with a large waterproof cover and deepened groove, it is resistant to rain and suitable for outdoor use. Ideal for installation at front doors, window frames, driveways, walking paths, shops, garages, and more. [38 Chime Options] Choose from 38 built-in chime tones; equipped with a high-quality speaker and 4 levels of adjustable volume. Low power consumption ensures reliable performance while allowing you to hear alerts clearly. [Power Supply] The receiver can be powered via standard electrical outlet, while the transmitters operate on 3 x AAA batteries (not included), enabling flexible placement at key entry points. Specifications: Color: Black Material: ABS Detection Angle: 120 degrees Detection Range: 3-7m Transmission Range: 200m (in open area) Frequency: 433MHz Ringing Tones: 38 Receiver Power Supply: AC 110-240V plug Transmitter Power Supply: 3 x AAA batteries (not included) Transmitter Size: 8.5 x 8 x 2cm / 3.3 x 3.1 x 0.78inch Receiver Size: 8 x 8 x 5.5cm / 3.1 x 3.1 x 2.1inch Package List: 2 x Transmitter 1 x Receiver