Tesoro Silver uMax

The Silver uMax is the machine people recommend when somebody asks for a light detector that just works. A 10 kHz signal suited to silver and copper coins, two knobs, under two and a half pounds, and battery life measured in whole seasons. It has no screen and no menu, so everything depends on the audio, which is exactly why people who learned on one tend to be good at reading a signal. Machines and compatible aftermarket coils are here.