Features:
- Advanced wireless transceiver technology for stable performance
- High-quality voice processing technology for clear sound
- Multi-purpose as a doorbell and anti-theft device
- Infrared detector for welcoming guests
- Door sensor alarm for added security
- Long operating range of up to 150m
- 32 selectable tunes and 4 adjustable volume levels
- Easy installation without the need for drilling

Specifications:
- Connection Type: Wireless
- Power: Electric Supply
- Display: None
- Intercom: No
- Alarm: No
- Certification: CE
- Smart home platform: None
- Operating Voltage: AC 100-220V
- Working Current: <100 mA
- Wireless Frequency: 433 MHz
- Operating Temperature: -10°C to 50°C
- Wireless Distance: Up to 150m

Package Includes:
- 1 Wireless Doorbell Transmitter
- 1 Receiver
- Door Sensor

Transform your home security with the Fuers M557 Wireless Doorbell. With advanced technology, clear sound, and multiple security features, this doorbell is a versatile addition to any home. Enjoy a welcoming tune selection, easy installation, and peace of mind with the infrared detector and door sensor alarm. Upgrade your home security today!