Earpieces connect to Motorola Solutions radios and can be as simple as just a single receiveonly earpiece for private audio, or advanced multi-wire kits with separate wires for the earpiece, microphone, and push-to-talk (PTT) button.Because of their design, earpieces are a varied category of accessory and can be used in a variety of situations where headsets are impractical or too bulky for the user, such as front-of-house staff and security personnel.