Lot 2 x Coodio 3.5mm Professional Receive Only Earpiece [Covert Acoustic Tube] Listen Only Headset For Two Way Radio Remote Lapel Speaker Mic Microphone Smartphone iPhone Samsung Coodio's 3.5mm jack plug professional surveillance receive listen ONLY earpiece headset specifically designed to for radio users to privately receive messages with the earpiece and is ideal when environments require discreet communication. Nipple style earbud fits snugly in the ear and provides all day comfort. Best replacement receive-only earpiece for Motorola RLN4941. High quality transparent acoustic tube headset that could hardly be detected by people around you(also reduces electronic radiation), ideal for surveillance purposes and security at airports, casinos, crowd control, conventions, concerts and other working environment requiring discreet communications. Compatible with two way radio remote speaker mic lapel microphone that have 3.5mm earphone jacks, also compatible with Smartphone(iPhone,Samsung,Blackberry,HTC...), MP3 players and other audio accessories with 3.5mm audio jack.