①. [Wireless IR Motion Sensor Alarm] With 1 receiver and 2 transmitters, can effectively detect movement in the surrounding areas and trigger alert to the linked receiver, providing security for your property and loved ones. ②. [118m/ 387ft Large Working Distance] 5-8 meters effective detection range, with strong penetration force, signal can be sent to the receiver 118m/ 387ft away. ③. [3 Types of Alert Settings] Audio chimes, LED flashing chimes, and chimes & LED flashing chimes for free choice, and there are also 4 kinds of audio chimes optional. ④. [Wide Application] IP44 waterproof level, suitable for outdoor use, can be used as a driveway alarm, doorbell, and home security alarm, providing safety and convenience in many ways of your daily life. ⑤. [Easy to Use] With wall mounting hole, can be easily installed on wall, trees, posts, fences, and more, plug and play setup, ready within several minutes; several transmitters and receivers can be used together. ⑥. Color: White ⑦. Material: ABS ⑧. Detection Range: 5-8m ⑨. Working Range: 118m ⑩. 3 Signal Options: Audio chimes, LED flashing chimes, chimes & LED flashing ⑪. Ringing Volume: 1-120dB ⑫. Power Supply of Transmitter: 9V 6F22 battery (not included) ⑬. Power Supply of Receiver: 6V battery/ 3 * 1.5V C batteries (R14 batteries) (not included) ⑭. Transmitter Size: 11 * 6.5 * 4.5cm/ 4.3 * 2.5 * 1.7inch ⑮. Receiver Size: 12 * 9 * 3cm/ 4.7 * 3.5 * 1.1inch ⑯. Please do not expose the product to direct sunlight, rain, car lighting, etc. ⑰. Only 2 transmitters are included. ⑱. Batteries are not included. ⑲. 2 * Transmitter ⑳. 1 * Receiver