Crystal clear deep bass 6W + 6W HD loud speakers with 40mm premium drivers for both active outdoor and indoor use. Built-in 3.5mm audio line in and 1000mAh rechargeable battery allow SB571 to connect to media devices with or without Bluetooth capability. Bluetooth 3.0 audio wireless connectivity with seamless streaming, 10 hours of playback time, from 33 feet away. Two 40mm speaker driver output with deep bass and crystal clear sound. Fashionable and stylish design with solid performance and universal compatibility for Android, iPhone, iPad, tablets, smartphones, iPods, MP3, MP4, radio players and other Bluetooth enabled digital players or media devices with aux port.