The tester is to connect with the 12V 13-pin Euro-type socket. It can also connect with 7 pin socket through a 13-7 pin towing adaptor. It works for MOT testing of class 4, 5, and 7. The cable is 5m long enough for user to do the test while sitting in the vehicle. The tester can also do self-test (not work for 7 pin socket), 12V power check, ignition and reversing light.
CAUTION: The self-test is not available with 13-7 pin towing adapter because there is no continuous feed via the 7-pin socket.