4-Way Cable Toner Mapper to Ring Out and Identify Multiple Coaxial Cables Review

Great tester, very easy to use with straight forward readouts. My only complaint is that when i opened it, I pushed the test button twice to verify function, I put a color attenuator on it and no response. I replaced the batteries and tried it again and it worked great. The tester takes 2 button cell batteries, CR3032.