Product "Enjoy the Convenience. Meet the safety." BLDC motor with high performance designed by high techmology and Know-how Product Features ·WIRELESS:Easily replaceable extra battery(2 batteries provided) ·Minimum X-ray exposure: less than 1/7 of other X ray systems ·Inverter type high frequency circuit ·Compatible with all digital sensors in the market ·Either sensor of film is OK to use with More than 300 X-ray shots before battery runs out ·Most compact portable dental X-ray in size and weight (1.8kg) in the market Name of parts 1. LOW battery indicating lamp 2. Skid-proof grip 3. EXPOSURE lamp 4. EXPOSURE button 5. Cone 6. Radiation Aperture(X-ray field: 50mm round-style) 7. Battery pack cover - See more at: http://www.bestmadeinkorea.com/product-6521/Medical/DX3000.html#sthash.IbGsZCwh.dpuf