The Audio-Technica ATW-3211/831EE1 wireless microphone system with AT831cH lavalier mic is part of the fourth-generation 3000 Series wireless systems that give you the power and flexibility to operate within the congested UHF spectrum. 3000 Series systems have an operating range of 300ft and are available in two frequency bands - DE2 (470-530MHz) and EE1 (530-590MHz) - that provide a class-leading 60MHz tuning range, which is more than twice that offered by the previous 3000 Series models. Frequencies can be easily scanned and selected on the receiver and then synced with the transmitter via IR sync functionality. The 3000 Series even lets you set a backup frequency that can be quickly swapped by pressing the transmitter's multifunction button in the event of unexpected interference. Available system configurations feature an ATW-R3210 receiver along with an ATW-T3201 body-pack or ATW-T3202 handheld transmitter. The ATW-T3201 is equipped with Audio-Technica's new rugged cH-style screw-down 4-pin connector for secure connection to A-T's cH-style lavalier and headworn microphones, or cables. The ATW-T3202 comes with either an ATW-C510 dynamic or ATW-C710 condenser interchangeable cardioid capsule, and its industry-standard thread allows for the use of four additional A-T capsules, plus other compatible capsules. Both transmitters feature rugged, metal housings and are powered by two AA batteries. Charging terminals on each transmitter work with the ATW-CHG3 and ATW-CHG3N smart charging docks (sold separately) to recharge NiMH batteries.