Mainframe
Display	3.5" HD-LCD	Power Supply	4000mAh lithium power
Battery	Rechargeable 4000mAh	Battery Life	>   20hours (continuous)
Operation Temp.	-  20°C to 50°C	Storage Temp.	-  30°C to 70°C
Size	78mm  x 22mm x 56mm	Weight	85g

Focus adjustment Gently rotate the focus adjustment knob to bring the image into focus. Do not overturn the knob or damage to the optical system may occur. Adaptor bits Always install adaptor bits gently and co-axially to avoid damage to the precision mechanism.