Motion sensor voice doorbell

Motion sensor voice doorbell Classification : Wireless sensor doorbell, wireless doorbell/Mini Remote control doorbell. Power supply : Use 3 "AA" replaceable batteries,can last for one year (Press 20times per day), it is designed for eviroment protection .The rechargeable battery is also available if you need. Advantage : *Wireless easy mounting design never affects your decoration, you can put it anywhere you like; *The intelligent flash light design brings convenience to the hearing handicapped; *Delicate smart part, makes the doorbell a saluting angel of dwelling house, working building, hotel, shop and so on. Size:6X6X2.7CM. Never miss any guest!