Trendwoo Outdoor Waterproof Bluetooth V4.0 Portable Speaker with DSP Noise Reduction Dual X-Bass Driver and up to 15 Hours Playtime for iPhone Samsung and More (Orange) &iexcl;&shy; Advanced 4.0 technology provides stutter-free wireless music streaming and seamless high clarity audio. Built-in mic supports hands-free phone calls & outstanding bluetooth connection range of up to 33 feet for convenient wireless freedom 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 Powerful 4000mAh built-in polymer lithium battery provides up to 15 hours of playtime, 3-4 hours on a full charge with micro USB cable 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! Top 10 Best Outdoor Bluetooth Speakers in the market--With premium sound quality and attractive aesthetic appearance, 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