Avantree Portable Wireless Bike Speaker with Bicycle Mount & SD Card Slot, 10W Powerful Enhanced Bass & Wireless NFC Pairing, Splash Proof, Shockproof & Dustproof for Riding, Outdoor 10W POWERFUL SOUND: Experience bold sounds and rich bass even against noisy backgrounds from the outdoor speakers 5W dual speakers and passive bass radiator. THE BEST WIRELESS SPEAKER FOR SPORTS ENTHUSIASTS: Cycle, hike or even sail to your own distraction-free soundtrack with an IPX4 splash-proof, shock-proof rubber exterior, bike mount, belt, and snap hook design. THREE PLAYING MODES: Enjoy your favorite music in the way that suits you with this versatile, portable speaker by choosing Wireless, Micro SD/TF card or AUX line. NEAR FIELD COMMUNICATION (NFC): Start listening to music on the move straight away by connecting this NFC speaker with your NFC-enabled mobile phone easily with just one tap. 24-MONTH WARRANTY & ONGOING SUPPORT: Feel confident in your purchase with the 24-month warranty. You're also welcome to get in touch with our email support team if you have any questions about your purchase.