[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. [Long Wireless Transmission Distance] Signals can be transmitted up to 200m (656ft) away in open areas, providing reliable security for your property and loved ones. [IP52 Water-Resistant Design] Features a protective cover and sealed design to resist splashing water, making it suitable for outdoor use. Ideal for doors, windows, driveways, walkways, shops, garages, and more. [38 Selectable Chimes] Choose from 38 different chime options; equipped with a built-in high-quality speaker, low power consumption, and 4 levels of adjustable volume to suit your preference. [Power Supply] The receiver plugs into a standard AC outlet for continuous power. Each transmitter operates on 3 x AAA batteries (not included), allowing flexible placement at entrances or driveways. Specifications: Color: Black Material: ABS Detection Angle: 120 degrees Detection Range: 3-7m Transmission Range: 200m (open area) Frequency: 433MHz Ringing Tones: 38 Power Supply Receiver: AC 110-240V (plug-in) Power Supply Transmitter: 3 x AAA batteries (not included) 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