Description: Features: 1.Light weight and compact device 2.A large and eye friendly LCD panel has been adopted on the unit 3.Energy saving feature. The power of the unit automatically turns off when there are no operations for 8 minutes. (Automatic shutdown function ) 4.High precision measurement guaranteed by advanced multi-frequency network impedance measurement and automatic calibrating. 5.The accessories of it can be subjected to high temperature and pressure autoclave sterilization. Specification: Power source: 7.5V DC Battery: 5*1.5v AA Power consumption: ¡Ü0.5W Operating Hours: About 8Hours Screen: 4.5¡¯¡¯LCD Package Include: 1*main body 1*measurement cable 2*file clip 5*lip hook