Product information:
Screen size: without screen
Operation mode: Button
Functions: positioning, loop video, parking surveillance, collision reaction, enhanced night vision, image deformity correction, front and rear videos, short video sharing, and others
Color classification: 

1style: front and rear 4K dual recording, 

2Style : 4K dual recording with 24H display cable, 

3Style:front and rear 4K dual recording (with car Inner Wheel pull),

 4Style 4K dual recording and 24H monitor cable (car Inner Wheel pull)