Compatible great for Motorola: XPR3000 XPR3300 XPR3500 XPR3300e XPR3500e (XPR 3300 3500 3300e 3500e) walkie talkie, etc. quick disconnect and lock function The speaker has a quick disconnect for the wire and tube, also can lock the wire in place when installed. Sensitive built-in microphone and rotatable clip transmits high quality sound even speak at low volumes; rotatable clip can free your hands and attaches firmly to your clothes. Soft and comfortable G shape earhook fits snugly in your ear and comfortable wearing for long time,showing high quality sound experience. Free Your Hands With Motorola XPR 3500e Earpiece, high-quality sound quality and no noise, it can be fixed anywhere on the clothes, freeing your hands and improving your work efficiency.