The HH76W handheld transmitters or the MBP64 or MBP76 body pack transmitters. The 64 series transmitters will sync with the DHTR. Feature an LCD display with a battery life indicator. The 76 series transmitters also feature a lockable mute button and have the ability to manually select the channel in addition to the sync function. All transmitters are powered by 2AA batteries. Both the HH64 and HH76 handheld transmitters have an interchangeable dynamic cardioid and super cardioid element (HH64SC is a condenser). Both body pack transmitters have a 0/-10/Mic selector switch.