1STPLAYER X-SOUND Bluetooth 4.0 Portable Stereo Wireless Speaker,Universal HD 30W Output Power with Enhanced Bass, 5400mAh Rechargeable BatteryCompatible with iPhone, iPad, Samsung and More (Black) 30W High Power----Implemented with 30W total acoustic drivers and large size dual-Diaphragm produce a wide audio spectrum. The newly designed passive radiator could provide strong bass without distortion even at highest volume. Bluetooth 4.0 Speaker Connectivity----Provides nature audio up to 33 feet, meanwhile,there are two passive subwoofers located on the right and left side of the speaker producing deep, enhanced bass. Connect to your devices over bluetooth in seconds. Long Play, Fast Recharge----Built-in 5400mAh rechargeable battery provides long as 5 hours music enjoying time at full volume. And when you at home, you can listen indefinitely by keeping the unit while charging the speaker with USB cable. Ultra Portable----It only weighs 3 lbs. Perfect for both indoor and outdoor including the living room, garage, kitchen,camping,hiking,biking and more. Intelligent System----Automatic identification of audio system is applied in it,therefore, dont need to confirm play mode manually. It supports bluetooth /U disk/3.5MM sound source play.