82 Inch Interactive Teaching System USB2.0 with document camera

82 Inch Interactive Teaching System USB2.0 with document camera Factory price interactive teaching system with built-in PC and document camera Competitive Advantage: 1. Adopted with proprietary technology, make system running in high efficiency and low EMI Interruption. 2. High-voltage and low-voltage circuit separately design, enhance the safety of whole system 3. System structure design with client’s practical applicability and operability, nice and easy to use. 4. High