About this item 【Open Ear Safe】The open-ear design of the open ear headphones wireless bluetooth allows you to hear the surroundings while enjoying your favorite music, avoiding some dangerous situations from happening effectively. Unlike other traditional earphones, the earphone is no need to plug into the ear canal, it makes you free from hearing damage, ear swelling pain and other problems. 【Bluetooth /MP3 Dual Modes】RR SPORTS air conduction headphones has built-in 32GB memory card, allowing you to listen to your favorite music directly from the headsets without phones, it can storage more than 5,000 songs (Support MP3/FLAC/WAV). The Bluetooth 5.0 technology offers faster and more stable connection, lower latency, and compatible with IOS, Android, Windows and more Bluetooth devices. 【24-Hour Playtime & IPX5 Sweatproof】Built-in 280mAh large capacity rechargeable battery with up to 24 hours of music playback or call time and only 2.5 hours of charging time, allowing you to enjoy continuous music for a whole day. Certified with IPX5 waterproof to withstand sweat and light rain, wireless conduction headphones are ideal for indoor and outdoor sports wearing. 【Stereo Sound Quality & Noise Canceling Microphone】Open ear air conduction headphones with built-in exclusive speaker, offering you a premium HiFi stereo sound, and the latest acoustics technology can greatly reduce natural sound leakage to protect your privacy. The environmental noise-canceling microphone reduces surrounding noises while phone call which brings you a crystal clear call quality. 【Lightweight & Stable Fit】RR SPORTS wireless bluetooth sports headphones are made of high-quality memory titanium alloy and skin-friendly silicone, strong and durable. Only 32g weight providing you with unparalleled comfort, designed for all-day listening. A ergonomic designed frame keeps the headphones stay in place while doing intensive exercise and they are compatible with glasses and helmet.