2in1 Wireless Doorbell Plug And Play Door Kit Adjustable-Volume 120M Doorbell Chime 36 Melodies & 6 Adjust Volume Features: Quality: Our wireless doorbell is made of ABS, recyclable, and can withstand rain and heat. Radio working range: The doorbell receiver has high sensitivity. One transmitter button triggers one unit. The radio waves cover the whole house and will not interfere with each other. The range in open areas can 150M, ensuring that you can hear the doorbell and open the door. 38 Different Tunes and 4 Volume : Our wireless doorbell offers 36 different ringtones with 4 of adjustable volume from 20db-80db. Energy saving and long life:-low power consumption, sustainable use of energy. Transmitter battery lasts over 15 months. Our wireless doorbells are extremely and can withstand over 100,000 clicks. Installation: Doorbell receivers require no batteries, and the receiver is easy to plug into an electrical outlet. The remote transmitter button can be fixed to the door frame using the tape or screws and anchors included in the package. Product Description: The maximum working range in open areas is 150M 36 unique ringtones 4 volume Volume range: to 80dB Package includes: 1x receiver 1x