SOUL Electronics P910B Party In A Box Ultimate Wireless Portable Entertainment System Omnidirectional 8 Speaker Hybrid System - Powerful 8 speaker system with side firing dual 6.5" subwoofers, 3" midrange speakers and dual 1" tweeters. In addition there are dual front firing 1.5" midrange drivers. Bluetooth with aptX Audio - Stream music wirelessly from your Bluetooth enabled devices. aptX audio coding delivers CD quality wirelessly over Bluetooth. CD Quality Uncompressed Wireless Tri-Band - Two-way transceiver allows synching of more than one PIAB, wireless speakers and other sources. Digital Signal Processing - For precision balancing and mixing of bass, mids and highs. Also allows multiple EQ curves on your PIAB. USB Charging Port and Media Playback - Allows for charging of mobile devices through the USB port and playback of audio files through a USB stick.