power. 2. The input terminal of the multimeter has an outer diameter of 4.5mm and an inner diameter of 4mm, with a tolerance of ±0.05mm(as shown below). The minimum inner diameter is 3.95mm. Special note: Please use the accessories of Hantek company or purchase the suitable probe. If the probe size selected by the customer is not suitable, resulting in damage to the multimeter input terminal, in this case, our company need pay for maintenance! Resistance Measurement (2-wire) Resistance Measurement (4-wire) Capacitance Measurement Frequency/Period Measurement