Thank you for viewing! Please read the description carefully. ★Instant purchase OK!! ★Free shipping!! This is a junk item. Pairing between the transmitter and receiver is not possible. Both receivers have been confirmed to be powered on (sound and lights also confirmed). I think the transmitter is the problem. How about it for those who have the same doorbell and want to add more? Please refrain from purchasing if you are sensitive to details. No returns or refunds. Everything in the photos is included. Please check carefully. Also, if you follow me, I will give you a 5% discount!! I also sell various clothes and miscellaneous goods, so please take a look at #雑貨屋pamazon ♪