The Sennheiser Spectera SEK Bodypack is a bidirectional wireless unit that simultaneously manages digital in-ear monitoring (IEM/IFB) and mic/line audio over a single RF link. It features a 3-pin mic/line input plus a high-power, impedance-matched 3.5 mm headphone output, a persistent E-Ink display, and full remote control of volume, gain and RF health. The SEK supports up to seven hours of operation on a rechargeable BA 70 battery and is available in UHF (470–608 MHz / 630–698 MHz) or 1G4 (1350–1400 MHz / 1435–1525 MHz) variants. Bidirectional data and AES-256 encrypted audio ensure secure, interference-managed wireless performance.

Visit Sennheiser's official website for further technical specifications.