This listing is for a shark SHK350N 3.5 car down flip monitor. You asked for small size car monitors , well here it is. We believe this is the smallest roof mount screen available.
You can connect any rear view camera, gps or dvd system to this unit!

The Dimension of the 3.5" roof mount monitor is 4.06" x 3.27" x 0.79" (front size) & 1.5" (back size).

Details

• Two Audio/Video Input
• Reverse Imaging
• Works well with car backup camera
• Blue screen when no signal
• Tiny Slim remote controller
• special glass can be used as a mirror when no picture.
• Screen Size 3.5" Panel TFT LCD
• Resolution 1440H)*234V
• Contrast 250:1
• Brightness 300cd/sqm
• Response time (ms) R: 30/F:50
• Viewing angle R :60Min T:20Min B:40Min
• Color system PAL, NTSC
• Power supply DC+12V 10%
• Power consumption about 4W
• Picture mode 4:3
• Light sources CCFL
• Operation temp -10 C-+60 C
• Storage temp -20 C 70 C
• Brand new & Factory sealed
• 1 year exchange warranty