• 【Self-Powered Wireless Doorbell】Innovative kinetic energy technology generates power through button press, eliminating the need for batteries or wiring installation.
• 【Temperature Display Function】Built-in LCD screen displays ambient temperature in both Celsius and Fahrenheit, providing additional environmental monitoring.
• 【Long-Range Wireless Transmission】Operates at 433MHz RF frequency with transmission distance exceeding 150 meters in open areas, ensuring reliable signal coverage.
• 【38 Customizable Ringtones】Choose from 38 different ringtone options with 4-level volume adjustment ranging from 50dB to 75dB for optimal sound preference.
• 【Versatile Installation Options】Supports both adhesive mounting and screw installation methods, suitable for various surfaces and mounting preferences.

Specifications:

• Power Supply: AC 100V-230V 50/60Hz
• Power Consumption: 0.25W
• Number of Ringtones: 38
• Volume Level: ≥50dB/1M (up to 75dB)
• Working Temperature: -10°C to +45°C (Receiver: -20°C to +60°C)
• Transmission Distance: >150M (open area)
• RF Frequency: 433MHz
• Receiver Dimensions: 8.5 x 5.2 x 4.3-6.3cm
• Transmitter Dimensions: 67 x 33 x 18mm