Fnirsi S1 multimeter

This digital smart multimeter takes the guesswork out of measuring - automatic detection identifies what you're measuring, so there's nothing to set up manually. Beyond standard voltage, resistance, capacitance and frequency measurement, the FNIRSI S1 can even detect a live conductor inside a wall or socket, and tell you which wire is live (L) or neutral (N). Built-in rechargeable lithium battery included, so it's ready whenever you are.