[Wireless Motion Sensor Alarm] Includes 1 receiver and 2 transmitters, with an effective detection range of 3–7 m (9.8–22.9 ft) and a 120° detection angle, designed to detect movement in surrounding areas and trigger an alert on the linked receiver. [Long Wireless Transmission Range] Signals can be transmitted up to 200 m (656 ft) in open space, providing reliable coverage for property monitoring. [IP52 Rated] Features a waterproof cover and sealed design, suitable for outdoor use at front doors, windows, driveways, walkways, shops, and garages. [38 Alert Tones] Offers 38 selectable chimes, built-in high-quality speaker, low power consumption, and 4 adjustable volume levels. [Power Supply] The receiver plugs into a standard AC outlet. Each transmitter is powered by 3 AAA batteries (not included). Specifications: Color: Black Material: ABS Detection Angle: 120° Detection Range: 3–7 m Transmission Range: 200 m (unobstructed) Frequency: 433 MHz Alert Tones: 38 Receiver Power Supply: AC 110–240 V Transmitter Power Supply: 3 × AAA batteries Transmitter Size: 8.5 × 8 × 2 cm (3.3 × 3.1 × 0.78 in) Receiver Size: 8 × 8 × 5.5 cm (3.1 × 3.1 × 2.1 in) Package Includes: 2 × Transmitters 1 × Receiver