Sport Bluetooth Headphones, Bodecin Wireless Smart Rechareable Waterproof High Grain Earbuds/Earphones Support Smart Bluetooth V4.1 Build in Mic with Ear Hook for Gym/Outdoors/Running(Red-I) Magnetic and in-ear is designed for preventing falling off when sporting. Slight weight, addtional medium and large silicone ear caps are designed for different ears. 10-hour long time playing: Compared with normal ones, the playing time is twice as long. You can truly enjoy music. General compatiable with most devices with Bluetooth function. The item with advanced Bluetoot 4.1 technology can match two devices at one time.