Enhance collaborative learning; with the ability for three individuals to speak at once; full-duplex communication system fosters a more interactive and collaborative learning environment; suitable for educational tours and research studies Reliable performance for extended periods; say goodbye to frequent battery changes and downtime; wireless full-duplex communication system guarantees reliable performance; whether you're conducting all-day training or multi-day research trips Maintain connectivity; whether you're conducting tours in spacious museums or training sessions in open fields; wireless full-duplex communication system's long-distance capability ensures uninterrupted connectivity Adapt to changing conditions; easily adjust the intelligent noise reduction level with a simple long press of the ANC button on the transmitter; allowing you to adapt to changing environmental conditions throughout the day Quick and easy setup; wireless full-duplex communication system supports one-key pairing between the transmitter and receiver; as well as between the main transmitter and two secondary transmitters; ensuring a quick and hassle-free setup process Secure control at your fingertips; full-duplex communication system features a one-touch key lock; allowing you to easily lock and unlock with a simple slide; right for busy environments like tours, training sessions, or academic exchanges Hassle-free operation; no need to manually lock your device; full-duplex communication system automatically locks after 30 seconds of inactivity; this feature prevents accidental changes in functionality due to unintended touches while performing tasks Seamless integration for enhanced performance; the receiver's compatibility with the TT129 tour guide system wireless enhances overall performance and provides a reliable and efficient communication solution for your visit; training; or academic needs Ambidextrous design for all users; the D-shaped earphone of TT129 tour guide system wireless is designed to fit comfortably in either ear; accommodating different user preferences Unmatched channel selection; with 999 channels of wireless full-duplex communication system; you'll never experience disturbance; even in crowded spaces like conventions or multiple equestrian events happening simultaneously Batteries 11 Lithium Ion batteries required. (included) Item Weight 4.99 pounds Manufacturer Retekess Item model number TT129 Package Dimensions 11 x 8.5 x 8 inches