Bluetooth 4.0 Wireless Earphone, Ailkin Sport Headphone Sweatproof Running Exercise Stereo Earbuds Car Hands-free Calling Headset with Microphone for IPhone, Samsung, Android /IOS Phones, Black Multifunction: Exercise-proof & Sweatproof design guarantee 100% Stable and Comfortable when exercising, running, climbing, driving, skating,camping, fishing and other outdoor sports. Small, medium and big size earhooks included, 3 different sizes of ultra-comfortable earbuds ensure you get that perfect fit. High Quality Sound: High-fidelity stereo music and clear speech via Noise reduction. Built-in microphone allows you to answer and end calls, allows you to adjust the volume, pause, select songs and pick up calls completely effortlessly. Strong Wireless Signal: You can enjoy skip-free music in a 10-meter working distance, even if use your music devices left/right side, above/below waist. Support connects up to 2 Bluetooth cell phones at the same time. Universal device compatibility: Compatible with ISO and Android /most Bluetooth-enabled devices(Above Bluetooth 4.0 technology). What We Provide: Wireless Headphones, user manual, charging cable, and custom earbuds. This product is sold exclusively by Ailkin. 12-month warranty.