3 output modes including Bluetooth 4.2, Aux-In and TF card, you can enjoy the music in any way. Superior Sound & Built-in Microphone: Thanks to its high-sensitivity driver, you’ll enjoy the stereo and truly immersive sound while playing. Afraid of missing phone calls? No worries, this speaker comes with a built-in microphone IPX6 Waterproof, Dustproof, Crashproof: The Bluetooth speaker is made of special textile fabric materials, which protect it against water, sand and dust. Even more, the durable silicone housing and port cover make the speaker shock-resistant. Perfect for shower, pool, beach, camping, hiking and biking Ultra-Portable and Compact Design: With lightweight, round and compact shape design, it is easy to grab in your hand, hook onto your bag or backpack even your bike