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 200m (656ft) away from the receiver, providing security for your property and loved ones. IP52 Waterproof Design Equipped with a waterproof cover and deepened groove, it is suitable for outdoor use in various weather conditions. Ideal for front doors, window frames, driveways, walkways, shops, garages, and more. 38 Chime Options Choose from 38 different chime tones; built-in high-quality speaker with low power consumption and 4 levels of adjustable volume ensures you won't miss the alert. Power Supply The receiver plugs into a standard AC outlet (110-240V), while the transmitters are powered by 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, no obstacles) 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 0.78 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