Water bath rectangular Stainless steel (double wall) outer body made of mild steel, temperature controlled ambient to 95 degree +/- 5 degree complete to work on 220/230vAC.oscillating SS tray riding on ball rollers & oscillated through a governor controlled variable speed motor. Shaking speed is between 40-140 rpm controlled by speed controller. Supplied complete with one shaking try and cover, connecting cord and plug.