Sennheiser SK300 G2 Wireless Mic Bodypack Transmitter A: 518-554 MHz EW300 SK100
Sennheiser Evolution SK300 G2. Compatible with all generations of Sennheiser Evolution wireless mic receivers G1, G2, G3, G4 (EM100, EM300, EM500, EM550, EK100, EK300, EK500) that operate on Sennheiser's A, A2, or Aw+ band.