Main Features:- Full, high-def sound: Enjoy an impressively full sound quality and robust bass which realized through a 3W audio driver and passive subwoofer- Perfect acoustical quality, enjoy your music freely anytime and anywhere by bluetooth transmission- Speaker with microphone: To answer / ending a call- Small size design, you can put it in your jacket pocket or backpack small bag - IP65 waterproof, dustproof, scratch proof, shockproof, rechargeable, suitable for indoor and outdoor sports. - AUX IN function, support 3.5 mm interface, compatible with iPod / iPhone / iPod, mobile phones, MP3, MP4, computers, laptops, PSP all digital audio equipments - Note: This product is waterproof design, you can use it in the rainwithout any problem. But don't put it in the water for a long time- Battery: 3.7V, 750 mAh - Charging time: 2 Hours - Music play time: 5 Hours- Speaker impedance: 4 Ohm- Speaker power: 3 W