Shure SLX 2 / SM 58 / S6, handheld transmitter for SLX-Series with SM 58 capsule, dynamic, cardioid, Display with group, channel and battery, Frequence transmission from the reciever per infrared, 960 frequencies switchable, Pilotton, lock for Menu and on-off-switch, 2x 1,5 Volt batteries, frequency-range S6, 838.000 - 865.000 MHz, up to 20 compatible systems (on multible frequency bands, depends on the regulation of each country)