Quality ChannelsNo batteries needed, just press to ring the doorbell, simple and convenient, save the trouble of buying batteries. IP44 weatherproof for outdoor use, no need to worry about the transmitter being damaged by wind or rain, reduce your worries. 2 Receivers2 receivers with a large signal range, can be placed anywhere in the house. The extended range ensures that when you ring the doorbell, you can hear the doorbell signal from any position in the house, ensuring that you never miss the doorbell. Two Mounting OptionsYou can simply fix the transmitter to the desired location using the adhesive on the back. You can also fix it with screws for a more stable mounting. Both methods provide easy installation and make your life easier. Different ringtones38 different ringtones provide a variety of choices for you to find your favorite. With 4 adjustable volumes at the touch of a button, you can adjust the volume at any time according to your needs. Suitable for different