The Panasonic ET-MDNHM10 input board for mounting to the PT-RQ13K 3-chip DLP projector and it allows input of two HDMI signal systems. This unit does not operate as a stand-alone unit. Use it by mounting to the PT-RQ13K 3-chip DLP projector sold separately . It is recommended that installation and removal of the interface board for the main projector unit should be carried out by a qualified technician. Please contact the place of purchase.