Great gadget
For Oscilloscope Tester Keyring + battery
Perfect for quick testing of any HF (bandwidth starting not higher than from approx. 5 MHz) equipment BNC inputs (oscilloscopes, frequency counters, spectrum or wave analyzers etc).
Working like a charm, great build quality, but due lack of any cover not recommended for kids or absolute beginners :-)
Max, the Author, is a really nice guy to contact with.
