ข้อมูลทางเทคนิค Power Output : 6W Frequency Response: 70HZ-18k ฺBluetooth Version: 3.0 Voltage of built-in battery: 3.7V Distortion : <0.5% Noise Rate : > 60 dB Net weight : 385 g. Charging Voltage : 5V Talking Time : around 5 hours Transmission distance : 10 m. Dimension: 126*76*66 mm. Battery Capacity : 1200 mA Charging Time: 3-4 hours Working Time : 8 hou