Wireless Welcome Doorbell Features ● Shop Keeper in day time, anti-thief in the night, welcome /doorbell /alarm / color lights/ lighting 5in1 multi-function ● Remote transmission range up to 280M/918ft in the open space ● 8 chord music chip, 40mm big horn,36 chime melodies, remember your last set melody and volume level once powered off ● Colorful LED lights, adjustable brightness, distinguish multiple entrances by different colors ● 4 stages adjustable volume (Loud/High/Middle/Low ) from 113-25dB ● Receiver can learn from up to 32 wireless sensors like PIR motion, magnetic or vibration sensor as well as up to 8 remote controllers. Application: shops, Commercial Complex, Luxury hotels, offices, factories, homes, villas, driveways, walking paths , Supermarkets ,restaurants etc.