[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 sent to the receiver from over 200m (656ft) away, providing 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 front doors, window frames, driveways, walkways, shops, garages, and more. [38 Chime Options] Offers 38 different chime tones, allowing you to choose one that suits your preference. Features a built-in high-quality speaker with low power consumption and 4 levels of adjustable volume, ensuring the sound is clear when needed. [Power Supply] The receiver can be powered via a standard AC outlet, while the transmitters are battery-operated using 3 x AAA batteries (not included), allowing for 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 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 inches) Receiver Size: 8 x 8 x 5.5cm (3.1 x 3.1 x 2.1 inches) Package List: 2 x Transmitter 1 x Receiver