Product Features: Lightweight design, easy and convenient to wear. Soft ear-hanger that fit comfortably when wearing. Fits either left or right ear. Clear sound performance without distortion. Compatible Uniden 2.5mm 1-pin models: GMR1038-2CK, GMR1048-2CK, GMR1058-2CK, GMR1088-2CK, GMR1438-2CK, GMR1448-2CK, GMR1558-2ck, GMR1588-2ck, GMR1595-2CK, GMR1636-2C, GMR1838-2CK GMR2059-2CK, GMR2089-2CK, GMR2099-2CK, GMR2238-2CK, GMR2240-2CK, GMR2638-2CK, GMR2838-2CK, GMR2872-2CK, GMR2889-2ck GMR3040-2CK, GMR3040-2CKHS, GMR3689-2ck, GMR3699-2ck, GMR3799-2CK, GMR3799-2CKHS GMR4040-2CKHS, GMR4099-2CKHS GMR5089-2CKHS, GMR5099-2CKHS GMRS480, GMRS480-2 GMRS520, GMRS520-2, GMRS522-2 GMRS720, GMRS720-2 GMRS750-2CK FRS1200 FRS1400, FRS1400-2 FRS300, FRS300-2 FRS400, FRS400-2, FRS400-2BK, FRS400G, FRS400G-2, FRS420, FRS420-2, FRS440, FRS440-2 FRS500-2, FRS550W PMR845, PMR885 TR620, TR620-2, TR622-2 And other most radio models with 2.5mm 1-pin jack.