Sennheiser SL Handheld Set DW-3 EU R (Rack), Digital 1.9GHz wireless Speech Line system, Consists of SL Rack receiver DW-3 EU and power supply, SL Handheld 865 DW-3 EU, Up to 20 compatible channels under ideal conditions, Automatic Frequency Management by Wireless Link Protection Technology, 7-band Equalizer,