Bigstone Universal 3.5mm Radiation-resistant FBI style Handfree Transparent Air Tube Covert Earpiece Headset Earphone, Flexible Throat Mic Microphone Earpiece Headset for All Smartphones Specifically designed with PTT Key Radiation-resistant Transparent Air Tube Earpiece for you to keep away from phone radiation Built-in line microphone, PTT key. The Clip micro-speaker is located in the centre of PTT switch COMFORTABLE TO WEAR: made by high-sensitivity air ducts and transparent silicone earmuffs, it reduces electronic radiation. The use of telescopic design and built-in noise cancellation compression sponge, you can also adjust the size to wear more comfortably Environmental-friendly,durable & fashion looking and the cable adopt imported TPE,durable and can guarantee long term use UNIVERSAL COMPATIBILITY: compatible with all 3.5mm jack enabled devices, such as cell phone, smart phone, laptop, computer, android, iphone, gaming. (iPhone 4s / 5 / 5c / 5s / 6 / 6 Plus, ipad / mini / air 2 / 4, ipod nano / 5 / touch, Samsung galaxy S4 / S5, Note 2 / 3 / 4, M3, HTC, Motorola, Blackberry, etc. )