Features： [Wireless IR Motion Sensor Alarm] With 1 receivers 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. [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, giving you more movement. [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. [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. [Easy to Use] With wall mounting hole, can be easily install on wall, trees, posts, fences, and more, plug and play setup, ready within several minutes; several transmitters and receivers can be used together for higher level of security. Specifications： Color: White Material: ABS Detection Range: 5-8m Working Range: 118m 3 Signal Options: Audio chimes, LED flashing chimes, chimes & LED flashing Ringing Volume: 1-120dB Power Supply of Transmitter: 9V 6F22 battery (not included) Power Supply of Receiver: 6V battery/ 3 * 1.5V C batteries (R14 batteries) (not included) Transmitter Size: 11 * 6.5 * 4.5cm/ 4.3 * 2.5 * 1.7inch Receiver Size: 12 * 9 * 3cm/ 4.7 * 3.5 * 1.1inch Note： Please do not exposed the product to direct sunlight, rain, car lighting, etc. Only 2 transmitters are included. Batteries are not included. Package List： 2 * Transmitter 1 * Receiver