The ECM wireless receiver is an economical solution to great wireless microphone system. The ECM has 16 selectable channels, IR sync, diversity antennas mounted to the front of the rugged plastic casing. The ECM is available with handheld, bodypack with headset or lav, instrument cable, our popular guitar bud or with our wireless headset the HS-UBKT. The ECMR can be used and will sync with either the HH52 or MBP52 transmitters. The HH52 has gain control and an on/off switch. Both transmitters are powered by 2 AA batteries. The MBP52 bodypack transmitter has 0/-10/mic selector switch.