CLEAR SOUND, GOOD LOUDNESS - built-in dual 5W audio drivers to deliver superior sound (you might not expect from a compact speaker) and satisfy your daily various audio demand. • FAST WIRELESS PAIRING, BROAD COMPATIBILITY – very latest Bluetooth technology 4.1, for better signal stability, power saving etc., solid connectivity with range up to 33 feet in open space, universal pairing with most of Bluetooth-enabled devices like PC, tablet, computer, mobile phone etc., also can connect through Aux-in cable physically if you need. • EASY PORTABILITY,UNIVERSAL USE– compact size (7.4x3.1x2 inch) 15oz, easy to fit in your baggage, suitcase, backpack etc., the featured rubber strap for hanging, uniquely designed slot on the bottom to attach to standard Gopro bike bracket. • ANTI-VIBRATION, DUST RESISTANT, WATER RESISTANT- rubber sealed lids over all the ports, rugged case to comply with IP65 rating (the second number 5 stands for protecting from gentle splashing, raining). • LONG BATTERY LIFE - 6+ hours playing time(half a day) powered by built-in 2000mAh rechargeable lithium battery, charging about 3-4 hours through USB-connected Charger or power source.