The Rhino Speaker Microphone features high quality speaker and microphone elements allow for clear audio while transmitting and receiving. The sleek speaker microphone also features a large PTT switch, reinforced metal clip that rotates a full 360 degrees and a 3.5mm audio jack for an external listen only earpiece. Safety Tip: Add-on a listen only earpiece for enhanced situational awareness and private listening. 4 different styles to choose from.