Transmitter is a designed for use with the Shure SLX series wireless microphone system. The transmitter is powered up to 8 hours on 2 AA size batteries. A 4-pin male microphone input receptacle accommodates any Shure microphone featuring a TA4F connection. The SLX1 features an infrared sensor, allowing the transmitter to remotely sync frequency settings with the receiver. An adjustable mic / 0dB / -10dB switch allows input from guitars, instruments and microphones.