DescriptionCommodity Quality Certification : ceThis product may be intended for use by a health care professional use only. The seller may ask you to evidence you are a qualified health care professional entitled to buy and use such products in your country.Product features:This is a big power, high efficiency vibrator, the unique design of heat radiation base make it always work in long time.It has two grades, weak grade, strong grade, can be changed as necessary.Product description:Before power on, put the switch in the middle part ''O'', and then power on, turn on the switch( the indicator light comes on ), and choose the strong grade or weak grade, finally turn on the switch two or switch one, it starts to work.Specification:Voltage:220V/50Hz+-10%Maximum load:2KGPower:120WDimension:24*18*10cm (Inner packing size)Package Included:- 1X JT-51B Small Square Dental Vibrator- 1X English manual