Review on Tenma ASM232 RS232 Signal Tester by Bobby Plymell

Very reliable signal tester. Love the fact that the LEDs are flush with the case and can't be moved while in my tool bag. The only thing I don't like is the female end, where it usually has to be plugged into a male connection with screws (which aren't usually removed). If you remove the screws on this adapter, it will fall apart. I've tried a few pan head screws to hold it together, but it's difficult to connect its female end to a plug adapter or cable.