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, capable of detecting movement in surrounding areas and triggering an alert to the linked receiver. Large wireless transmission distance allows signals to reach the receiver from over 200m (656ft) away, providing security for your property and loved ones. IP52 waterproof design with a protective cover and sealed construction ensures reliable outdoor performance in various weather conditions, suitable for use at front doors, windows, driveways, walkways, shops, garages, and more. 38 selectable chimes offer a variety of sound options; equipped with a built-in high-quality speaker, low power consumption, and 4 levels of adjustable volume for customizable alert settings. The receiver can be powered by plugging into a standard electrical outlet, while the transmitters operate on 3 x AAA batteries (not included), allowing flexible placement. 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 Power Supply for Receiver: AC adapter (110-240V) Power Supply for Transmitters: 3 x AAA batteries (not included) Transmitter Dimensions: 8.5 x 8 x 2cm (3.3 x 3.1 x 0.78in) Receiver Dimensions: 8 x 8 x 5.5cm (3.1 x 3.1 x 2.1in) Package List: 2 x Transmitter 1 x Receiver