Sennheiser 2000IEM2-A

Overview
Dual Channel IEM Wireless System (Frequency Range Aw, 516 – 558 MHz)
Dual Channel IEM System: (1) SR2050XP IEM-Aw dual channel stereo IEM transmitter; (2) EK2000 IEM-Aw stereo IEM receivers with IE4 earbuds. Frequency range Aw (516 / 558 MHz)