Manufactured from durable stainless steel, the KP-55 features a smaller nose and rubber grip, and is our smallest (5.35), with a slim body diameter (0.78) and lightest (5.6 oz.) Handpiece. The KP-55 features a dynamically tuned coreless motor with 2 high speed precision ground bearings that allow it to operate at very high speed, 30, 000 RPM with virtually no vibration! It has a molded strain relief cord and is compatible with MANIPro Passport Control Box, KP-5000, UP-200, UP200-V and Upower 2-G Control Boxes. Full 1 year parts and labor warranty with your KUPA Handpiece.FEATURES Ultra Smooth Quiet Vibration Free Locking chuckEasy bit changeUse standard 332 bits Compact light weightPortableRechargeable8-10 Hours of Battery LifeVariable speed controlHigh torque 30, 000 RPMQuick charge system - full charge in 2 hours Automatic switching 110220 Volts