Shure SLX 1 / S6 - pocket transmitter for SLX Series. Display with group, channel and battery. Frequency transmission from the receiver via infra red, 960 switchable frequencies, pilot tone, lock for menu and on/off-switch, requires 2x 1.5V batteries, TQG- lug for microphone or instruments, S6 frequency range (838.000 - 865.000MHz), up to 20 parallel systems on multiple frequency bands, depending on local/national regulations.