Juicebar JamBar Speaker Tube is a refreshing burst of audio and power that lets you entertain on the go! With vibrant acoustics and up to 16 hours of extra talk time the Juicebar JamBar replenishes your active lifestyle in style. Just plug your device directly into the built in 3.5mm audio prong and amplify your favorite music videos and other media. Compatible with virtually any USB device and ready for use right out of the box. Life's better at 100%. PRODUCT SPECS 3500mAh rechargable Li-ion battery. Up to 16 hours of extra talk time (100% boost). Built in 2W speaker. USB and 3.5mm audio port 3.5mm audio connector. LED light battery status lights. Output Voltage: 5V/1A