The Midland MA27M ear microphone is compatible with G15 PRO, G18 PRO, ARCTIC, and Motorola radios. It features a VOX/PTT switch for selectable communication modes, allowing either hands-free VOX operation or push-to-talk (PTT) use. The earpiece is designed for comfortable fit and includes an adjustable height mechanism for use on either the left or right ear. It uses a screw jack connection and is designed to integrate securely with the radio connection.