The Bellco High Torque Process Controlled Overhead Drive is a versatile direct-drive agitator for cell culture and most aseptic mixing applications. The Overhead Drives were developed to eliminate the problem of magnetic agitator decoupling often observed in large volume mixing and the stirring of solutions with a viscosity greater than water. The Overhead Drives feature brushless, maintenance-freeDC motors with drive assemblies designed for quiet operation. Both units are powered by standard 24V wall mounted power supplies and are CE compliant. Speed range: 5 - 150 rpm +/- 1%Electrical: 115v/24v fused at 2 AMPBrushless motor for low maintenanceReverse direction switchRs485 network portEasy mounting bracket with ‘peg & grommet’ designHi-torque models: 31 in-lb torque, 50w Dimensions: 9.5" x 6.0" x 7.5"(24 x 15 x 19cm) includes handle, 115v. MADE IN THE USA