CCTV Tester Display Screen size: 3.5" Compat Size, Portable Easy to carry ... right rotation of cloud platform, and adjust the varifocal, focusing and aperture value of the ball machine. ... .4V lithium battery charger. Product Features Handheld 3.5 inch TFT high DPI monitorAutomatic identification of multi ... off under 1-30minutes no action.Controlling rotation, lens focal length, focus etc. of the ball ...