Features: Transmits and receives Very light weight which is very comfortable to wear for long time With heavy duty Kevlar reinforced wire Strain relief cable for maximum durability Loud, clear audio 2.5mm accessory jack for earpiece Speaker Specification: Dimension (mm): ￠32 Sensitivity: 112±4dB Impedance: 8Ω Rated output power: 0.25W Peak power output: 0.5W Microphone Specification: Dimension (mm): ￠6*5 Sensitivity: -38±3dB Frequency: 1kHz Rated output power: 2.0V/2.2KΩ Peak power output: 1-10V Compatible: Kenwood TK-208, TK-308, TK-220, TK-320, TK-240, TK-340, TK-240D, TK-340D, TK-248, TK-348, TK-250, TK-350, TK-353, TK-260, TK-360, TK-260G, TK-360G, TK-270, TK-370, TK-270G, TK-370G, TK-272G, TK-372G, TK-373G, TK-278G, TK-378G, TK-388G, Pro-Talk, TK-430, TK-431 Kenwood TK-2100, TK-3100, Pro-Talk, TK-2102, TK-3102, TK-2107, TK-3107, Pro-Talk, TK-2160, TK-3160, TK-2170, TK-3170, TK-3173, TK-2200, TK-3200, TK-3101, TK-3131, TK-3130, TK-2400VP, TK-2400Uk, TK-2400VK, TK-2402Uk, TK-2402VK, TK-3400UP, TK-2402VK, TK-3402UK, TK-2360, TK-3360, TK-2312, TK-3312, TK-3230XLS, TK-3300, TK-3300VP, TK-3301E, TK-3302, TK-2312, TK-3312, TK-3360, TK-3400, TK-3402, TK-3401DE, TK-3401DT, TK-3501E, TK-3501T, , TK-2400V, TK-2402V, TK-3400U, TK3400UP, TK-3402U Kenwood Nexedge NX-220, NX-230, NX-240V, NX-320, NX-340U, NX-420 Kenwood PMR-446, TH-D72A, TH-D74A, TH-F6A, TH-K20A