Wireless Waterproof Motion Sensor Alarm 1)5MODES Suitable for Various Environment Welcome Mode/Doorbell Mode/Alarm Mode/Alarm Mode/Colorful Light Mode/Night Light Mode 2)Shop keeper in day time, anti-thief in the night up to 918 feet (280m) away. up to 113dB loud sound 3)8 chord music chip, 40mm big horn,36 chime melodies 4)Colorful LED lights, adjustable brightness, distinguish multiple entrances by different colors 5)4 stages adjustable volume(Loud/High/Middle/Low ) from 113- 25dB 6)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. 7) EASY INSTALLATION As for this visitor motion chime, there are no wires to run, no installation hassles, the sensor is wall mountable.