Smart learning mode, user-friendly design Strong signal – penetrates 3-4 walls with a wireless range of up to 150 meters in open areas, ideal for large homes, villas, apartments, offices, shops, and warehouses IP68 waterproof rating – suitable for use in rainy conditions, safe and durable 38 songs home welcome door chimes – doorbell can be muted during sleep Functions as both a doorbell and a pager – when the elderly, babies, or pregnant women need assistance while sleeping, press the transmitter button to activate the receiver chime Note: 1. This product is sold as a set. Receiver and controller must be used together and require pairing; units purchased separately cannot be interchanged 2. Do not mount the button directly on iron doors as metal may block the signal. It is recommended to install the button adjacent to the iron door Power consumption: 0.25W Wireless frequency: 433 MHz Operating temperature: -10°C to +45°C Ringtone volume: >50dB at 1m Transmitter: no battery required Wireless range: 150 meters (open space) Plug type: EU plug, compatible with countries including Indonesia, Germany, France, Spain, and Italy Voltage: AC 100–240V Color: White Material: Plastic Dimensions: Receiver: 95 x 54 x 68mm Transmitter: 80 x 50 x 28mm Package contents: 1 x Button 1 x Receiver Only the items listed above are included; other accessories are not included Note: Lighting effects and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1–3 cm