Motorola PMLN8191 Single-wire Surveillance Earpiece for Wave TLK110 and EvolveThe Motorola PMLN8191 single wire Surveillance Earpiece offers discreet communication with a coiled translucent cable, in line PTT, and a clear acoustic tube for comfortable, extended wear. Designed for use with Motorola TLK 110 radios, and the Motorola Evolve LTE device, it features enhanced loud audio, a twist and lock connector, and a replaceable translucent tubeideal for retail, hospitality, and security settings.