• 【Self-Powered Technology】Generates power through finger pressure, eliminating the need for batteries or wiring installation - completely maintenance-free and eco-friendly.
• 【Long-Range Wireless Transmission】RF 433MHz frequency provides transmission distance over 150 meters in open areas with strong wall-penetrating capability for reliable indoor coverage.
• 【38 Chord Ringtones】Choose from 38 different chord sounds with 4-level volume control (≥50dB at 1 meter) to customize your doorbell experience.
• 【Intelligent Memory Function】Automatically saves your ringtone and volume settings even after power outages, eliminating the need for reconfiguration.
• 【Anti-Interference Design】Same frequency but different codes prevent mutual interference with neighboring doorbells, ensuring reliable operation.

Specifications:

• Transmission Distance: >150m (open area)
• RF Frequency: 433MHz
• Number of Ringtones: 38
• Volume Level: ≥50dB at 1m
• Power Supply: AC100V-230V 50/60Hz
• Power Consumption: 0.25W
• Working Temperature: Transmitter -20℃ to +60℃, Receiver -10℃ to +45℃
• Product Dimensions: Transmitter: 67×33×18mm, Receiver: 85×52×43mm