Multimeter compatible with Fluke, very large display (like desktop). Has a signal for not working for 3 minutes, and an automatic shutdown to save battery. Plastic coating for fall protection, automatic range detection, combination of a wide range of measurements, including temperature. No need or dependence while another product (not an add-on to a tablet, this product stands on its own and with great success) allows direct / alternating current measurements, direct voltage / exchange, resistance, continuity, capacitance, frequency, transistors, temperature. The battery lasts for over 1000 working hours. Measuring AC / DC currents up to 20 amps. Comes with a pair of probes and a temperature probe.