A novel wireless motion sensing device for control of realtime electronics is presented. The device consists of a small (25×40mm) circuit board including all circuitry and battery, and contains a complete inertial measuring unit (IMU), measuring both acceleration and angular velocity in 3 dimensions. Data is transmitted wirelessly via a bluetooth link and can be read from applications either using bluetooth serial emulation, or using a small standalone server application that converts incoming data and sends reformatted data out via OSC. 1