?<strong>Feature:</strong> <br>Built-in lithium Battery charging circuit <br>Powerful noise elimination circuit <br>Class II power level. <br>High-fidelity Sound Quality.? <br>Directly and easily Powered by USB. <br>Bluetooth Version: Bluetooth V2.0£¬ and compatible with V1.2£¬ V1.0£¬ V3.0£¬ V4.0 Standard. <br>Equipped with Standard 3.5 audio interface. <br>Supports all common 2.1 audio Speakers <br><br><strong>Specifications:?</strong> <br>Chip: OVC3860 stereo chip <br>Transmission distance: 10m (Class2) (can¡¯t through flesh and glass)? <br>Frequency: 2.4 GHz? <br>Interface: 1 * Standard USB£¬ 1 * Standard 3.5 audio interface. <br>Power Supply: DC 5.0V / 120mA <br>Color: Blue <br>Main Item Size: 55 * 16 * 4mm / 2.16 * 0.62 * 0.15in <br>Main Item Weight: 4g / 0.14 oz <br>Package Size: 70 * 60 * 10mm / 2.75 * 2.36 * 0.31in <br>Package Weight: 5g / 0.18oz <br><br><strong>Package Lists:</strong> <br>1 * Bluetooth Chip