WIFI Smart Function: Work with tuya smart App, Alexa, Google home etc. Can unlock the door from anywhere by Phone for any visitors | Wireless Function: 2.4Ghz wireless receiver, no need any hard-wired for Handheld remote, Push button, wave to open button, Access Keypad etc. | Power Adapter with UL listed, 12V Low power, Safety for DIY. | Easy installation and modification for old system. The only hard-wired is receiver with lock Wireless button can be easy stick to the door or wall. | Easy Use: You can use handheld remote or Phone App to get in, and get out door by motion sensor( when walk close to door ),it will detect person and trigger to open lock automatically. High-sensitivity, quick and accurate response.