Douwin Lock Video for wireless hotel doorbell

The wireless touch-screen hotel doorbell system(D.N.D, room number display, Check in or not, Clean room)without the traditional signal cables. You can choose the music(38songs) as you like. www.douwinlock.com

[@DaraManik]

Cara merakitnya kek mana bos

[@shaikhsattar8960]

Sahi sestem card ke bina bell chalna chahiye tub hi oska fayda hai

[@yasarbastawala28287]

Wireing digram

[@douwinlock9354]

in order to keep contact online between us to save much time, pls add me as follows:
email: [e-mail], www.douwinlock.com
wechat: douwinlock,
skype: dongming7075,
whatsapp: [phone]
we can send more photos and videos for our locks by wechat, whatsapp or skype.

[@shaikhsattar8960]

Ye galat sestem hai