latest Car Dash Cam Auto DVR camera Driving Recorder with USB port plug and play.

You need to connect it via USB (from android car stereo), and install an App to android unit, then will be fine. here is a video demo.

Features:
100% brand new and high quality
1. Non-destructive Installation Designed for the original car style, do not block the line of sight.
2. Take power from cable instead of the previous fuse box. It's easy for the customer to connect the wires.
3.No built-in lithium battery,
4.Comes with APK.
5. Signature low-profile design allows the DVR camera to be a witness to the road ahead. 
Description:
Size:4.5*3.8cm
Material:ABS
Image resolution:12M / 10M / 8M / 5M
Video encoding format:AVI
Resolution Rate:1080P / 30FPS; 720P / 30FPS
Built-in aperture:F = 2.4 LED
Weight:93G
Color:Black 
Package included:
1 * Car DVR
1 * USB power cord
1 * User Manual 

Note:

2 it can only fit above the 4.1 version for the android system, and it is better for you to have a check before you order it. 

3 you can just install it near the rear glass, and there is no need for you to get the rear glass down