HS 02 Professional Headset - with gooseneck microphone and PTT button. Perfect fit thanks to in-ear earbuds. For even better support, you can use the included ear hook or neckband. Usable on both the left or right side. The innovative circuitry of the HS 02 allows for hands-free or push-to-talk operation without additional switching at the microphone. Simply switch the radio to VOX (hands-free function) or PTT (push-to-talk operation). Connection socket: 2.5/3.5 mm for Albrecht/Midland radios.