USB-TTL (0-5 Volt) input and output device. 2 input lines and 2 output lines. To be used with StreamPix or TroublePix for interfacing with external device for start/stop recording, generating pre-post events or more. Can also drive output lines based on software status. Includes 2 female input BNC connectors as well as 2 push buttons to drive the input lines. (Up to a total of 8 input/output lines can be added for an additional cost.)
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