134 dB input dynamic range - no need to set gain on your wireless transmitters at all, thanks to proprietary Sennheiser Performance Audio Codec (SePAC) 10mW fixed RF power for up to 328' (100m) of range Charging contacts for in-device charging with CHG 70N charger (sold separately) Persistent E-Ink display for 'always on' information - parameters visible on screen even when taking out batteries Up to 12 hours of operation time with rechargeable lithium ion battery BA 70 (sold separately) Programmable mute switch (AF Mute, RF Mute, no function) Function buttons - control all the transmitter settings directly from the handheld including button lock function Digital audio trim Test tone generator Switchable LED configuration (On/Off) Switchable low cut (Off, 30 ,60, 80, 100, 120 Hz) Versatile charging options optionally available: CHG 70 N, L 70 USB, LM 6070 Module for L 6000 full rack charging station (Availability in 2023)