abcGoodefg 1 Pin Covert Acoustic Tube Earpiece Headset With Mic PTT for Motorola SL7550 7580 7590 SL300 SL4000 SL1K SL1M 2 Way Radio Walkie Talkie (Acoustic Tube Earpiece) Transparent acoustic tube makes you low profile and protects your health from radio electromagnetic wave radiation Clear sound performance without distortion for both listen and talk. Directional and extremely durable PTT microphone. Ideal for police, military, nightclubs, bars, paintball, security,restaurants, hotels, bouncer, warehouses, and noisy environments. Compatibility: Motorola SL7550, 7580, 7590 and SL300 SL4000 SL1K SL1M.