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, apartments, offices, shops, and warehouses IP68 waterproof rating – suitable for use in rainy conditions, durable and long-lasting 38 chime melodies – doorbell can be muted during sleep hours Functions as both a doorbell and a pager – press the transmitter to alert when elderly individuals, babies, or pregnant women need assistance Note: 1. This product is sold as a set; receiver and transmitter must be purchased together and paired for operation 2. Avoid mounting the button directly on metal doors, as this may block the signal. Place the transmitter beside the metal door for optimal performance Power consumption: 0.25W Wireless frequency: 433 MHz Operating temperature: -10°C to +45°C Ringtone volume: >50dB at 1 meter Transmitter: no battery required Wireless range: 150 meters (open space) Plug type: EU plug, compatible with countries including Germany, France, Spain, Italy, and Indonesia Voltage: AC 100–240V Color: White Material: Plastic Dimensions: Receiver: 95 x 54 x 68 mm Transmitter: 80 x 50 x 28 mm Package contents: 1 x Button 1 x Receiver Note: Lighting effects and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: ±1–3 cm