Speaker unit: 5.25 inch 4Ω20W full frequency speaker + 1.5 inch tweeter.<br />Battery: 2400mAh. Charging time is about 5 hours. Music time: about 8 hours. Talk time: about 12 hours (80% volume, light off mode). Note: equipped with wireless microphone.<br />Two wireless microphones are standard. upport dual wireless microphones + one wired microphone input ">