wireless doorbell
1.custom sound
2.when people close to or pass by it in 0-2meters and it will play your custom sound.
3.OEM

wireless doorbell

1.When people close to or pass by it and your pre-recorded sound will play.

2.The size is 90mm(L)X60mm(W)x22mm(H).

3.Your custom sound with mp3 or wave file will be welcome .

4.Your OEM or ODM design also can be made.

5.With good sound quality.

6.Sensor doorbell is very suitable for your door to put.