Key features

• •🎐【No Battery Needed】Our doorbell transmitter use a new tech with the self-generating function & waterproof. Once the transmitter is pressed, it generates electric power itself. No battery needed at all. You won't need to take trouble in exchanging batteries any more and worry about the power off or rainy. No missing of any vistor with it.
• •🎐【Colorful Led & 4 Level Volumn】 You could also see the colorful visual Led Light flash during the doorbell receiver ringing. This door bell kit is a great paging device for elderly & people with the hearing impaired to notice. There are 4 level volumes from 25db---100db, you could set the volumn according to different needs.
• •🎐【Long Range & 38 Chimes】 The transmitting range up to 800ft in open area ensures you to hear the ring bell and answer the door timely. There are 38 different melodies, you could set & change anytime you like. Such as you could set to "Jingle Bells" during the Chiristmas Days.
• •🎐【Easy Installation】Screws and double-sided adhesive tapes included in the ringbell parcel, you could fix the transmitter to the doorframe easily and plug the receiver into an electrical outlet (no batteries required for main receiver), then the doorbell will work immedaitely.
• •🎐【Widely Application】 It fits for home, apartment, classroom, office, villas and more. You can use our doorbells to train dogs, using it to quiet down classrooms, when you ring the bell, the students will know it's time to move on to the next group, the kids are loving it also.