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 The signal can penetrate 3-4 walls with a wireless range up to 150 meters in open areas, suitable for large houses, apartments, offices, shops, and warehouses. Feature 2: IP68 Waterproof Rating Designed for durability and safe outdoor use, it performs reliably even in rainy conditions. Feature 3: 38 Songs Home Welcome Door Chimes Multiple chime options allow personalized selection. The doorbell can be muted during sleep or quiet hours. Feature 4: Dual Functionality as a Doorbell and Pager Ideal for monitoring individuals such as elderly family members, babies, or pregnant women. Press the transmitter to activate the receiver chime when assistance is needed. Feature 5: Smart Learning Mode with User-Friendly Design Includes multiple plug types (EU, UK, US) to ensure compatibility with various electrical outlets. Specifications: - Operating Voltage: AC 100-230V - 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 - Receiver Size: L95 x W54 x H68mm - Transmitter Size: L80 x W50 x H28mm - Wireless Range: 150 meters (open space)