Brand CHEERLINK Model CT-12 Quantity 1 Color Red + black + silver Material PCB Application Computer motherboard diagnostic card; PCI parallel port 4-bit desktop test card; Parallel USB diagnostic card Other There are three modes: Debug self-test query; This card can recall 88 recently records; It has UP and DOWN keys and easily to use don't need any skill; Wen press UP and DOWN keys at the same time card will enter self-test mode (display "0000" or "FFFF"); In self-test mode when press UP and DOWN keys at the same time card will return to debug mode; In self-test mode when press any keys of UP or DOWN card will turn to query mode; In query mode if port has a new code card will enter debug mode automatically; When computer is busy in POST don't press any key until it stops (Display "00" or "FF" or any fault code for a long time); These notes are suitable for 4 bits debug cards that have ISA PCI mini-PCI or LPT interface. Packing List 1 x Diagnostic card 1 x Data cable (50cm) 1 x English user manual