【 11 Ringtones Suitable for Various Environment】 Doorbell Mode(8 chimes)/Alarm Mode/Birdsong/Colorful / Night Light Mode 【 Long Distance Wireless】 with a Working Range up to 280m/918ft between the receiver and motion sensor. detection range of the infrared sensor approximately 4-8m/13-26ft to keep you informed and safe 【 4 stages adjustable volume】 (Loud/High/Middle/Low ) from 113- 25dB 【 DIY Pairing 】 The receiver can learn from up to 32 wireless sensors like PIR motion, magnetic or vibration sensor as well as up to 8 remote controllers. 【 EASY INSTALLATION 】 The device can be charged by micro USB or installing with batteries（infrared sensor need three AAA batteries and receiver need three AA batteries)to make it work.
eBay