Description:
Plug play with for Tuyasmart app,No hub required,simple download the app on iOS and Android.
Make your door/window smarter when you leave home. You will find anomalies in your home immediately.
It will push notification to you if the doors or windows are opened or invaded by an external object.
Set push notifications to your mobile devices or sound and vibration for early alert of door/window are open illegal in your home.
Battery Wi-Fi powered, full of power long durable, replace the battery is simple, service more intimate. Provides remote home monitoring.

Specification:
Model: NAS-DS01W.
Material: ABS+PC.
Size:Main body: 71x21x22mm.
Deputy body: 40x11x11mm.
Color: white.
Battery: CR2 x 1.(Not include)
Standby current:10uA.
Wireless Type:2.4GHz.
Protocol:IEEE 802.11b/g/n.
Wifi distance:45m.
Operating Temperature:0?~ 40? (32°F~104°F).
Free APP: for Tuyasmart, one key setup wifi or ap mode connection with wifi.
Workes with for Alexa Echo and for google home.

Note
There might be a bit color distortions due to different computer resolutions.
There might be a slight errors due to different hand measurement.

Package included: 
1 * WiFi Smart Sensor(Main body + Deputy body).