waterproof high volume door bell 150m long distance self powered wireless doorbell

Application Home Office Hotel Apartment
Color White/black/golden
Material ABS Plastic
Power supply AC 100-230V 50/60hz
Music 38 Ringtones
Battery Self-genrated
Receiving distance 150M Remote (in Open Area)
Work Frequency 433.92Mhz
Certificate CE FCC RoHS
Waterproof IP44