These Orbital and Reciprocating Mode shakers have a 10 to 300 rpm shaking speed with shaking amplitude of 20, 30 and 40mm. Digital PID microprocessor controller with Opto-Electronic Feedback. Programmable motion - Clockwise, Anti-Clockwise and Pause. 999hr. 59min. shaking timer. Optional accessories include: Universal Platform, Flask Clamp, Spring Wire Rack, Rubber Mat, Test Tube Rack, Separate Funnel Clamp.