Trendwoo Bluetooth Waterproof Speaker Outdoor Speakers with Subwoofer 15 Hours Playtime Speakers for iPhone 7 plus iPhone 7 Speakers with Subwoofer: Super X-Bass sound, the bluetooth speaker performance is spectacular, it has excellent clarity and you can hear the separation between instruments and vocals as if they're coming out of different speakers. The bass is not earth sharttering but it does sound good and punchy for a speaker of this size and with no distortions at high volumes. Waterproof Speaker: IPX4 waterproof level make sure your best enjoying on hiking, sporting,traveling and on beach as well! A touch friendly silicone cover, more safe when dropped or falling down,so safe and surf! Speakers for iPhone: Trendwoo Music Tube is becoming more and more popular in Apple Store, Airport duty-free shop and high-end physical stores, which are rated as one of the top 10 outdoor bluetooth speakers by renowned Music Evaluation Institutions Hands-free Speaker : Built-in high capacity 4000mAh Rechargeable Battery for up to 15 hours of playtime. Built-in microphone for hands-free speaker phone calling. Universally Compatible: Suitable most Bluetooth-enabled devices. Such as iPhone7 plus 7 6s plus 5S 5 4S and Android smartphones,Samsung Galaxy Phones and so on.