The ultimate in compact design measuring only two by four inches. The BDC250 offers great capabilities in a small package; used in formulation, R&D, clinical research, education labs, anywhere a magnetic stirrer is used. It fits into small spaces and can be easily transported to other labs or classrooms. Everything you need assembled into a complete stirring package. Included in each purchase: overhead stirrer motor, integral clamp, stainless steel collet, external power supply, grounded power cord, stand, axial and radial mixing blades, mixing shaft, manual in four languages (English, French, Spanish and German) and three year warranty. Features: Brushless DC motor, Digital display, Electronic digital control, Purchased as a complete package. Benefits: High efficiency/less heat, Easy to use and repeatable settings, Precise speed adjustment, Everything you need for the classroom or lab bench. Includes: integral clamp, collet, mixing shaft, axial and radial mixing blades, stand, power supply, and grounded power cord. Speed: 50-2500 rpm, Volume Maximum: 2 L (0.5 Gal), Viscosity Maximum: Water-like, Torque Maximum: 10 N·cm (0.9 in-lbs = 14 in-oz), Output Power: 7 Watts (1/100 hp), Speed Display: Yes, Speed Accuracy: +/- 10 rpm, Torque Display: No, Zero Torque: No, Timer: No, Through Shaft: No, Chuck Maximum Shaft Diameter: 6 cm (0.24"), Chuck Guard: No, Housing: Chemical-resistant nylon, Weight: Power Supply: 0.105 kg (0.23 lb), Stirrer: 0.367 kg (0.81 lb), IP Rating: IP42, Voltage: 120 V/230 V must use Caframo power supply, Frequency: 50/60 Hz, Ambient Temperature Operation: 5-40°C (41-104°F), Relative Humidity Operation: 80%, Stand Rod: 500 mm (19 11/16?), Impeller Shaft Length: 187 mm x 6.0 mm (7 ” x 0.24?), Radial and Axial Blades: 12 mm x 30 mm (½” x 1 3/16?), Manufacturer's Warranty: 3 years.