1. Feature- Radiation-proof : Air acoustic tube protect your body by reducing radio waves radiation.- Anti-noise : The Soft plastic earbud fits snugly to either left or right ear and deliver a great sound even in noisy places by air acoustic tube.- Tactical Hidden : Transparent acoustic tube earpiece could be invisible by transforming into the surrounding environment.2. Great for use : Police， military， bouncer， HAM amateur family businessman Pregnant and Team member.3. Compatible with: Mostly of cellphone with 3.5mm Standard Plug such as iPhone， iPad， Samsung， HTC， Blackberry， LG， Motorola， Sony， HUAWEI，Xiaomi...package include:1 x Air tube anti radiation for your cellphone