The Sennheiser Spectera SEK bodypack accommodates both IEM/IFB reception and a mic/line transmission simultaneously in a single bidirectional device. Spectera SEK body packs feature an impedance matching high-power headphone amplifier and offer up to seven hours of operating time depending on selected Audio Link mode and settings with rechargeable lithium-ion battery BA 70. 

Features:

• Accommodates IEM/IFB reception and mic/line transmission simultaneously
• Impedance matching high-power headphone amplifier
• Up to seven hours of operating time
• Rechargeable lithium-ion battery BA 70
• Adjustable Audio Link mode and settings
  
• 3-pin Lemo microphone input connector
  
• 3.5mm headphone output connector