Feature:1. Personalized Settings: 4 level volume adjustable, 38 high fidelity ringtones, you can set your favorite ringtone, meet different needs.2. IP44 Waterproof: The doorbell transmitter has IP44 grade protection, waterproof and dustproof, shockproof, beautiful body, sturdy structure.3. Modern LED Light: With a signal range of up to 280m, it is equipped with stylish led lights that illuminate and flash, making it easy for guests to find at night.4. Low Power Consumption: The transmitter adopts standby hibernation technology, and the standby power consumption is ultra low. Full touch keys, comfortable touch.5. Sound and Light Prompts: The wireless doorbell can also be used as an emergency alarm, one click call in case of an accident, suitable for the elderly, patients, pregnant women, etc.6. Wide Application: 2 wireless doorbell receivers with two transmitters, can be used for front and rear doors, can be used in homes, villas, hotels, factories, etc.Specification:Item Type: Wireless doorbell setMaterial: ABSReceiver Plug: AC110-240VFrequency: 433.92MHzBuilt in Ringtones: 38Button: TouchTransmission Distance: Approx. 280m/918.64ft (maximum, barrier free)Transmitter Battery: 1 x CR2032/CR2025 coin cell (not included)Waterproof Grade: IP44Uses: Can be used in homes, villas, hotels, factories, the elderly, patients, pregnant women, one key calling..Package List:2 x Transmitter2 x Receiver2 x Sticker1 x ManualNote:Please supply power according to the voltage used, using other voltages may cause fire and product damage!