- Type of microphone head: Large size standing microphone with a diameter of 10mm-2. Speaker unit: 52mm; power: 5W-3. Bluetooth 5.4; Chip: AC6965E4-4. Battery capacity: 1200mAh/18650 lithium battery; Charging time: 2 hours-5. Usage time: 4 hours-6. Supports Bluetooth, USB flash drive, TF card, AUX playback-7. Material: ABS; Size: 80 * 81 * 270mm; Weight: 370g