his product has been updated with new features and is now the 3000 Series Fourth Generation Wireless. Audio-Technica’s third-generation 3000 Series wireless systems offer up to 1001 selectable UHF frequencies and new features for clear sound & intuitive operation. We’ve simplified selection of usable frequencies, increased system reliability, and illuminated transmitter screens for clear reads on dark stages. It all adds up to the luxury of rock-solid, richly detailed high-fidelity sound. The versatile ATW-T310b cW-style body-pack transmitter features a secure 4-pin locking connector compatible with a wide range of cW-style microphones, as well as a guitar cable. A 3-position sliding cover on the transmitter’s control panel prevents accidental shut-off or channel-switching. A new locking battery compartment provides a more secure latch and more robust design. This system has the AT-831 lavalier microphone and a Point Source brand E6 ear-worn microphone in black. It's used and in great shape, our customer just doesn't need it any more.