Selling 1 piece of an RS-232 serial protocol tester. Has 7 status lights: TD, RTS, DSR, CD, RD, CTS, DTR. Comes with additional 9 pin to 25 pin adapter.Free pickup in West Los Angeles.No returns, I repeat, no returns! No returns! I say again, no returns...Thanks for supporting my small business, dba Grounded Grid. See pic for a hint of the meaning of Grounded Grid: a vacuum tube configured for high performance, i.e., obsolete technology used in a clever way. I also do software (ASM, C, some microPython), hardware, real-time code (interrupts, (as in Nuremberg) Hawkins, dba Grounded Grid, West Addams [sic] District, Los Angeles