S17 Mini Portable Tour Guide Teaching Loudspeaker with Screen Display(Cool Black) Tag-Other One Package Size 3cm *

One Package Size 3cm * 3cm * 0

one-click burst

5mm speaker adapter for amplifier

3 inches: 330 grams

1 or 2 channels

S17 Mini Portable Tour Guide Teaching Loudspeaker with Screen Display(Cool Black) Tag-Other One Package Size 3cm *1. Material: rubber paint, ABS, electronic components 2. Function: teaching, tour guide, conference, training 3. Built in battery: 2200mAh lithium battery 4. Charging time: 3 hours 5. Use time: 20 hours 6. Standby time: 72 hours 7. Using head mounted acoustic microphone, ergonomic design, comfortable to wear 8. Using 3 inch speakers, the volume is larger and the transmission range is wider 9. Support U disk TF card playback 10. The length of the belt