Wireless Portable Amplifier 1.1000channels use at ... board 4.MOQ 30 sets Wireless Portable Amplifier,2.4g Bluetooth Digital AmplifierSpecifications1: This education ... .Certificate:ISO 9001:20007.A line 2.4G wireless MIC input8.A line advanced audio input, echo, ... classroom,multimedia room,conference,multifunction hall.12.Selectable MIC:1090,1060.More Specification: PARAMETER:modelwy-2000frequency ...