Self-Power Wireless Doorbell 1.32 Songs Home Welcome Door Chimes 2.150M Long Wireless Control Distance 3.Waterproof Door Bell 4.Four Levels of Volume 5.Self-Power, No Battery Required Feature 1: Strong Signal It can penetrate 3-4 walls and has a wireless range up to 150 meters in open areas, suitable for large houses, apartments, offices, shops, and warehouses. Feature 2: IP68 Waterproof Rating Can be used in rainy conditions, durable and reliable Feature 3: 38 Songs Home Welcome Door Chimes The doorbell can be muted during sleep hours Feature 4: Functions as a Doorbell and a Pager Ideal for monitoring elderly individuals, babies, or pregnant women; pressing the transmitter triggers the chime Feature 5: Smart Learning Mode with User-Friendly Design Includes multiple plug types: EU, UK, US – one compatible option included Specifications: 1. Operating Voltage: AC 100-230V 2. Power Consumption: 0.25W 3. Wireless Frequency: 433 MHz 4. Operating Temperature: -10°C to +45°C 5. Ringtone Volume: >50dB at 1m 6. Transmitter: No battery required 7. Receiver Size: L95 x W54 x H68mm 8. Transmitter Size: L80 x W50 x H28mm 9. Wireless Distance: 150 meters (open space)