S17 Mini Portable Tour Guide Teaching Loudspeaker with Screen Display(Bright White) Filter-13.3 inch Scroll wheel button: Middle button

Scroll wheel button: Middle button

VGA: 640 x 480

Support system: WINXP

Frame rate: 20

40HQ: 1052 cartons * 8 pcs = 8416 pcs

S17 Mini Portable Tour Guide Teaching Loudspeaker with Screen Display(Bright White) Filter-13.3 inch Scroll wheel button: Middle button1. 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