technical specification: Performance: rotation speed: 20-200r/min. Temperature adjusting range: water temperature, indoor temperature -90 degree;oil temperature, indoor temperature -180degree. Functions: temperature set and display: digital display Rotation set: rotary button type Flask capacity: 0.25-2L Lifting device: seasaw type push button, automatically lift and lower,travel distance 150mm Constitution: Motor: induction motor, output power: 40W Heating device:: alluminium alloy teflon,for water bath and oil bath Cooling device: vertical type, double return integrated spherical neck condenser,which is made of high temperature resistant quality glass through refined process, equipped with spherical neck collecting flask to accomplish the effect of quickly loading and unloading. Test flask: eggplant-shape flask (1L) round-shape flask (0.5L/2L),joint size 29 Recovery flask: round-shape flask (1L) Seal circle: PTFE composite + fluoro-elastomer dual seal circle