A thin wedge shaped box - 1” x 2” x 0.75” - with a low profile press to talk (PTT) button on the front side and velcro -pin for mounting on the backside. When you press this button, you can feel detent confirmation that radio has been keyed. There are two miniplug sockets on top - plug the Invisio headset into one and an optional finger or ring PTT - sniper switch into the other. This lower cordset will accommodate optional fingertip or ring PTTs which are frequently required by SWAT but the switch is smaller and more discrete than the switch D making it suitable for surveillance applications. The cable is terminated for your radio.