Output power: 3W Original CRS 4.0 high compatible BT module Multi-point function, available to pair two Bluetooth audio devices at the same time. 3.5Watts 45MM driver to ensure loud, clear and rich audio experience. Inside magnet 16 core loudspeaker, less distortion and more natural sound. High-end Zinc metal with electroplating and UV finish Hands-free Calls. Build-in CVC Smart noise cancellation technology digital mic to ensure clear phone call Build-in 500 mAh PLB(not simple PIB) battery with soft pack to ensure a safe transportation and worry free from explosion. A class battery cell giving up to 6 hours of constant playback and 500 times charging lifespan. Product size: 64.6 x 64.5 x 70.10mm