KENMAX 2 Pin Speaker Mic Microphone Earpiece Extension Cable for Two Way Radio Walkie Talkie Motorola PR400 PRO1150 PRO2150 PRO3150 SP10 Extension Cable length: 2 meters Hands free compatible with radios that are hands free capable. 2-PIN socket for your earpiece/headset & speaker/microphone 2-PIN plug Two-pin standard diameter: Ear 2.5mm stereo. (top pin) Mic 3.5mm stereo.(bottom pin). Excellent for use in police, military, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses, and noisy environments.