The single wire listen only covert earpiece kit provides excellent comfort, reliability and performance in low-profile environment. Covert acoustic tube earpieces are ideal for demanding covert security applications where sound clarity and earpiece durability are of paramount importance. Designed to work with any Kirisun radio that has a standard 3.5mm jack socket. All two pin Kirisun radios have this socket.<br> <br> This listen only covert earpiece has excellent voice quality, is small and more concealed than any other earpiece and enables you to use a radio without attracting attention. The clear acoustic tube is hidden behind the ear and cables routed under clothing. It is ideal for noisy and quiet environments as it helps block out ambient noise and incoming radio traffic is private to the wearer and impossible to hear by someone stood nearby.<br> <br> <b>This earpiece features a 90 day "no questions asked" money back guarantee.</b>