This is a small smart doorbell. When there is a visitor, you will get a notification on your phone when he/she rings it. You may get the photo of the visitor at the same time.
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://sg-res.9appsdownloading.com/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
