This Bluetooth Speaker with 3D sound system (S815) is a Portable Wireless speaker. It has supported with FM, USB, SD Input, USB, SD, MMC, DVD, PC, MP3, MP4 and Mobile Phone. It has 10 meters Transmission distance. It has Bluetooth playback, intelligent noise reduction, high-fidelity sound, speakerphone, TF card player, AUV audio player, U disk player, radio. It has 3-4 hour Charging time and 5-8 hour Playing time. It has a big power capacity of 1200mAh.