RS-232 Serial Mini Tester & Loop Back Tester

Type 1 : RS-232 Serial Loop Back Tester, DB9 to DB25, Female to Female, 2 PCS/ Pack.

Type 2 : RS-232 Serial Surge Protector (3MOV) DB25 to DB25, Male to Female, 1 PC/Pack.

Type 3 : RS-232 Serial Mini Tester for Serial Port DB25 to DB25, Male to Female, 1 PC/Pack.

Type 4 : RS-232 Serial Check Tester with Green/Red LED Indicator, DB25 to DB25, Male to Female, 1 PC/Pack. 

Type 5 : RS-232 Serial Jumper Box DB25 to DB25, Male to Female, 1 PC/Pack.