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 for your property and loved ones. [118m/ 387ft L Working Distance] 5-8 meters effective detection , 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 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 . Specifications： Color: White Material: ABS Detection : 5-8m Working : 118m 3 Signal Options: Audio chimes, LED flashing chimes, chimes & LED flashing Ringing : 1-120dB Power Supply of : 9V 6F22 battery (not included) Power Supply of Receiver: battery/ 3 * 1.5V C batteries (R14 batteries) (not included) 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 , etc. Only 2 transmitters are included. Batteries are not included. Package List： 2 * 1 * Receiver [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 for your property and loved ones. [118m/ 387ft L Working Distance] 5-8 meters effective detection , 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