The unit has a temperature range from 5*C. when the tube lights are ON temperature range is from 10*C to 50*C, A circulation fan is fitted to maintain temperature uniformity throughout. Cyclic illumination conditions are controlled by an automatic timer (0-24) fitted to the unit. It is fitted with digital speed mater (RPM COUNTER) for shaking platform having variable speed. The shaker has variable speed and a platform containing 16 flasks of 500ml or 40 flasks of 100ml or 34 flasks of 150ml capacity is supplied with the unit as standard accessory.