Wireless Waterproof Doorbell.

With strong wireless signals up to 300M inside your home or business in an open area, ensures you will never miss a visitor, loud enough to be heard in other rooms and even by those with impaired hearing
A variety of different ringtones, 4 adjustable levels from 15db to 115db, you can easily choose your favorite melody , you will find the one you love best. The transmitter could works at temperature between -10? to 60? (14°F to 140°F), premium-grade IP55 waterproof and sealing technology ensures its perfect.
No accessories needed, broadly ideal for home, office, hotel, dormitory, factory etc. And does not interfere with other equipment in your home,

What's in the box

1 x Push Button
1 x Receiver
1 x Adjustive tape
1 x Battery
2 x Screws
1 x Manual