1.This portable dental X-ray unit is high frequency machine. 2.The body is small, light weight and nearly no radiation. 3.It has excellent image quality, portable storage, save more space. 4.It uses high frequency and DC international power supply. 5.All of the components installed in the central PC board concentrated. Shock,set-up, electron tubes, all of them are insulation vacuum, sealed stereotype protection. 6.There are also manual buttons installed on ...