The unique, two-speed transmission delivers constant performance under changing condistions. Mixer features a sparkless, brushless DC motor that provides a long, maintenance-free service life. The totally enclosed non-ventilated motor is rated for continuous duty. Overload protection automatically shuts off the mixer if maximum torque is exceeded — an LED light signals overload conditions. The through-shaft design lets you easily alter shaft length and impeller depth. Mixers have an aluminum alloy housing.