Sennheiser ew D1 ME2 Lapel Set, digital 2,4 GHz Wireless-System, comprising EM D1 9,5" receiver, SK D1 pocket transmitter and ME2-ew condenser lapel microphone, omni-directional with 3,5mm ew-jack connector, up to 15 compatible channels under best conditions, automatic frequency management with Wireless Link Protection Technology, internal De-Esser and 7-Band Equalizer, Automatic Gain Control, aptX-Live Codec, 9,5" metall receiver with removeable antennas, incl. transport case, 2x AA Batteries, power supply and battery holder, optional BA30 rechargeable battery, GA 4 Rackmount and CHG-2 battery charger available, worldwide licence free use