... for Interactive Whiteboard 1.Power:input DC 6V 2.classroom,church,conference 3.Certificate:ISO9001,CE 4.2*50W 2.1 Channel Amplifier for ... Interactive Whiteboard of education Feature/Function:1. Techonology:The multimedia ... DC power source.8.Certificate:ISO9001,CE9.Application:this system is applicate to classroom,church,conference room and ...