Functional, Compact 2-way Transceiver Listen Technologies' LK-1 ListenTALK Transceiver is a handy all-in-one device for group tours and other sound reinforcement applications. This smartly designed system offers super simple pairing and built-in encryption for critical listening applications. And thanks to its LED display and push-to-talk functionality, the LK-1 can be used by anyone in your audience without a problem. It comes with a universal ear speaker and is compatible with any standard earphones or Listen Technologies headsets. Here at Sweetwater, we appreciate the LK-1's long-lasting rechargeable Li-ion battery. It offers 12 hours of operation for listeners and seven hours for group leaders, making dead batteries in the middle of a conference a thing of the past.Listen Technologies LK-1 ListenTALK Transceiver Features: 2-way wireless transceiver Push-to-talk functionality makes communication easy Encrypted transmissions add extra security for critical applications Included rechargeable battery Breakaway lanyard offers hands-free operation Universal ear speaker sits comfortably