The product consists of 1 wireless doorbell with plug, 1 wireless doorbell, and 1 doorbell. It is easy to install thanks to radio transmission. The transmission indicator light in open space has a maximum range of 150 m at a frequency of 433 MHz.

Includes:

• 58 melody settings
• Individual melodies reaching up to 90 dB
• Expandable to 20 transmitters/receivers
• Volume adjustment in 5 levels
• Mute switch
• Melody selection on the bell (front/back)
• The wireless doorbell operates on battery (for indoor use only)
• Waterproof button for outdoor use (IP55)