1. Speaker unit: 5.25 inch 4Ω20W full frequency speaker + 1.5 inch tweeter.2. Sizes: 220*120*180mm. Weight: 1.9kg.3. BT specification: BT V5.0, MVsilicon BU1048B.4. Function: support BT, TF card, USB, AUX mode, support wireless microphone and wired microphone input, support microphone reverberation adjustment, original sound cancellation, applause, music warm-up special effects, music colorful lighting.5. Battery: 2400mAh 18650. Charging time is about 5 hours.6. Music time: about 8 hours. Talk time: about 12 hours (80% volume, light off mode).Note: equipped with wireless microphone.