• Optional 38 Ringtones: Choose your favorite ringtone based on your personal preference, making it your intimate friend
• Time display design, based on PC board display screen with high brightness, greatly improving the visual enjoyment
• 80-260V wide voltage operating range, allowing you not to worry about voltage instability
• The doorbell can support four levels of volume adjustment, which can be heard even from a distance
• 150 Meter Receiving Distance (In the open area): The wireless signal will be affected by obstacles. The more obstacles, the more serious the signal loss
• Buttons can be set to different music, used to distinguish front and rear doors

Specifications:

• Operating temperature: - 20 ℃ to 60 ℃
• Operating frequency: 433.92MHz+75KHz
• Receiver voltage: 80V-260V/50-60Hz
• Transmitter battery: No battery required
• Volume: 0-110 dB, 4-level adjustable