Proxelle Portable Wireless Bluetooth Speaker with External Battery Charger Built In Power Bank with 2 USB Ports for Outdoor (Black) 2-IN-1 AWESOMENESS: Situations arise. Surge Power is uniquely designed with an ULTRA-POWERFUL built-in power bank - with 10,000 mAh, it can charge up to two devices at the same time, which allows for double the convenience SUPERB SOUND QUALITY: Bluetooth 4.0 better-than-ever-before sound system makes for audio that's completely free-of background noise AUDIO FOR HOURS: Blast this speaker all you want - it's got 12 hours of playback time, 20 hours of talk time, and 800 astounding hours of standby time RUGGED TO THE MAX: It's shockproof, so you can be sure it won't easily broke. Handy and portable speaker with silicone case for extra protection. Its Multipoint Function allows you to simultaneously connect to two devices - easily control music or take call hands-free OUR PROMISE TO YOU: Excellent after sale service offered and our goal is to make sure you're completely happy with every purchase