Source Audio SA111 Hot Hand Wired Sensor Ring PackThis is the original Wired Hot Hand Sensor from Source Audio. After plugging its 3. 5mm connection into the sensor input of, say, a Soundblox pedal, simply wrap its ring like accelerometer around your finger, and you'll be able to modulate parameters on your stompbox by moving your hand around. With this sensor, any effect modulation that utilizes expression control, which would typically be regulated using your footwah wah or evelope filtering, for