Professional and portable testing device'. '.strtoupper('t')he subzero cable tester is suitable for sound engineers and musicians'. '.strtoupper('t')his unit accepts most audio cables including xlr rca din and more'. '.strtoupper('y')ou can check the various connectors of your cables with total confidence'. '.strtoupper('t')otally compact and lightweight simply running on a 9v battery this is the perfect device to grab and go'. '.strtoupper('t')he subzero cable tester is also very easy to use with indicator leds for an intuitive and straight forward display'. '.strtoupper('a')s well as a low battery indicator so you are never caught short'. '.strtoupper('q')uickly spot errors to make your setups clearer and safer'. '.strtoupper('p')lease refer to the attached pdf manual for full testing procedures and testing capabilities.