I found them inside the box.
No, as of now Alexa app has no functions with the contact or motion sensors. What I do is I’ve made a distinct notification on my phone and fire tablets that are obnoxious in sound so when the door (contact sensor) opens I know.
Wyze Sense has launched! The sensor kits are available for purchase here: Home Monitoring & Automation – Wyze.
The Wyze Sense user manual and support can be found here: https://support.wyzecam.com/hc/en-us/categories/360001610132-Wyze-Sense.
For questions not answered above, please search and/or post in #ask-the-community.