abcGOODefg TM271 Modular 8 Pin RJ45 Plug with DTMF Keypad Remote Speaker Mobile Microphone with PTT for Kenwood TK-768G/868G 7100/8100 7108/8108 7360/8360 TM-271A/471A 281A/481A D710A V71A Modular 8-pin RJ-45 plug with DTMF keypad. This mic speaker is made of durable material with the RJ-45 6-pin plug with DTMF keypad keyboard. It enables you to talk and listen without having to remove the radio from your belt. Just clip the speaker mic where convenient and use it to listen and transmit. DTMF(Dual Tone Multi Frequency) function will open the radio's squelch only when it receives a DTMF code that matches one pre-programmed into your receiver. Each tranceiver is normally programmed with a unique code.