Feature:1. Multi Purpose: Wireless doorbell is versatile, not only as a doorbell, but also as a pager, with strong practicability.2. Wide Application: Waterproof mini doorbell can be used in homes, villas, hotels, factories, etc. It is also suitable for the elderly, patients, pregnant women, etc.3. Long Distance Transmission: Nursing pager can transmit signals in a long distance. In an open place, the transmission distance is more than 150 meters, with strong penetration and one to one signal pairing.4. IP68 Waterproof: Pager system adopts IP68 waterproof design, which is suitable for outdoor use and can prolong its service life.5. Easy to Use: Waterproof wireless doorbell is a self generating doorbell, which is wiring free and battery free, and easy to install and use.Specification:Item Type: Wireless DoorbellMaterial: ABSUses:For Homes, Villas, Hotels, Factories, the Elderly, Patients, Pregnant Women, Etc.Specification: 1 Call Button,2 ReceiverDoorbell Transmitter:Power Supply: Self GeneratingDoorbell Receiver:Power Consumption: 0.25WRingtones: 38 RingtonesTransmission Distance: Open Space > 150mRadio Frequency: 433mhzRing Volume: 50db/1m.Package List:1 x Wireless Doorbell2 x Receivers 1 x Sticker1 x User ManualNote:Please supply power according to the voltage used. Using other voltages may cause fire and product damage.