Keyblu Surveillance Kit Acoustic Tube Listen-only Earpiece for 2 Way Radio (3.5MM) Fits two-way radios (audio only), radio speaker mics, remote mics, MP3 players, and other audio accessories with 3.5mm earphone jack Soft silicone ear bud to fit snuggly in your ear with a transparent acoustic tube Heavy Duty Material. Superb Audio Quality. Rugged Design Excellent for use in police, military, nightclubs, bars, security, restaurants, hotels, warehouses, and noisy environments Notice: If you are unsatisfied with this product, you could ask for refund at any time