☆ Universal replacement coil tube for acoustic tube earpiece ☆ Includes coil tube, mushroom-shaped ear tip,fin earmold and twist-on connector ☆ Clear acoustic tube are special ergonomic design,very soft and comfortable,reduce the tiredness of hearing ☆ Compatible with two way radio earpiece of motorola, kenwood, hytera, miland, icom, harris and more ☆ Please make sure to avoid the product getting wet or use the product in moisture condition. If it stops working, it’s because there’s moisture inside the tube. Blow the tube to make the moisture out of the tube and the earpiece will work perfectly