1. Material: rubber paint, ABS, electronic components2. Function: teaching, tour guide, conference, training3. Built-in battery: 2200mAh lithium battery4. Charging time: 3 hours5. Use time: 20 hours6. Standby time: 72 hours7. Using head-mounted acoustic microphone, ergonomic design, comfortable to wear8. Using 3-inch speakers, the volume is larger and the transmission range is wider9. Support U disk/TF card playback10. The length of…