detachable handpiece with automatic frequency tracking, works steadily can be autoclaved under the high temperature and pressure. (135℃, 0.22mpa) 1500 hours strength test without problem. lifetime maintenance. rate:230v- 50hz/60hz 150ma or 110v- 50hz/60hz 300ma main unit input:24v- 50hz/60hz 1a packing dimensions :245×214×193mm net weight:2.1 kg