Each bidirectional Spectera SEK body pack manages both an IEM/IFB and a mic/line stream simultaneously.Plus, they allow for full remote control and monitoring, via identical RF connection, of IEM volume, audio level and settings, RF health, battery status, and more via LinkDesk software. Variants include UHF (470608 MHz and 630698 MHz) or 1G4 (13501400 MHz and 14351525 MHz).Spectera SEK body packs feature an impedance matching high-power headphone amplifier and offer up to seven hours of operating time depending on the selected Audio Link mode and settings with rechargeable lithium-ion battery BA 70.Main Features:Bidirectional bodypack manages both digital IEM/IFB and mic/line signals simultaneouslyBidirectional data and audio control in identical RF carrier of all mobile devicesAvailable variants: UHF (470608 MHz and 630698 MHz) or 1G4 (13501400 MHz and 14351525 MHz)Full remote control and monitoring of SEK bodypack: IEM volume, mic/line gain, RF health, battery status, and moreImpedance-matching high-power headphone amplifierContinuous interference managementEndless encoder and push button3-pin mic/line input and IEM/IFB 3.5 mm headphone connectorLED meter, status LED and persistent E-Ink display for always on information name visible on screen even when batteries are removedUp to 7 hours of operating time depending on the selected audio link mode and settings with rechargeable lithium-ion battery BA 70 (sold separately)Encrypted RF connection between Base Station and bodypackSecure transmission of confidential content using AES 256 encryptionVersatile charging options also available: L 70 USB, LM 6070 Module for L 6000 full rack charging station and charging contacts for in-device charging with CHG 70N-CCompatible with a wide range of Sennheiser lavalier and headset microphones with 3-pin locking connector and in-ear monitors with 3.5 mm connectorRugged metal housingWhats in the box: -1 Spectera SEK 1G4