Features: ◎ Designed for sieving and testing of syphilis RPR,TRUST, VDRL. ◎ High quality DC motor, actual life>1000h. ◎ Tight and reasonable structure makes it run stably. Adapted to various environment. ◎ Adjustable knob design, easy to make it stepless speed adjustment and running at any time within 15min/60min. Technical Data: Operation method: Circling Speed: 20-210 rpm Off-center Rotary Diameter: 22mm Voltage: AC 220V±10% (50Hz) Power rating: 10 W Timing range: 0-15min / 0-60min Operate mode: Timing / Continuous Working plate Size: 315×218mm Dimensions: 320×320×130mm Net. Weight: 3.2Kg