Monster ClarityHD Precision Micro Bluetooth Speaker, Black Ultra-compact, high performance bluetooth speaker for best sound quality for music, handsfree, and speakerphone. Monsterous driver and passive radiator design delivers unrivaled clarity and superior sound quality. 120 CC of acoustic volume with two 35 mm full range drivers and passive radiator. Bluetooth 2.0 audio and digital signal processing for superior sound quality in a compact design. Rechargeable Lithium Ion batteries power up to 5 hours of play time at full volume on a single charge