Maximum test voltage: DC 0-40KV, AC 0-28KV (50/60Hz) Polarity: Both positive and negative can be measured Accuracy: DC: 1% to 20KV, 2% to 40KV/AC: -5% to -10% at 5O-60Hz Coefficient: 10-5OPF variable Temperature coefficient:less than equal 200PPM/ Name: High Voltage Probe Model: HVP40 Input impedance: 1000M Attenuation ratio: 1000:1 Maximum load current:less than equal 40A (at 40KV DC) Maximum power consumption (heating):less than equal 1.6 watt Working temperature: 0-+50 Storage temperature: -20-+70 Ground wire length: 90 cm (3ft) Cable length connected to the meter: 100cm (3.3ft) Designated connection: digital multimeter with 10MQ input impedance Meter output indication: 1000 digits x, that is, 1V 1000v Meter output indication: 1000 digits x, that is, 1V 1000v / 10V 10KV Net weight: 300g Please note: The meter, except that the input impedance is specified as 10MQ, The accuracy should also be within 0.5%, otherwise it affect the attenuation ratio. Note: If you are not professional for technology, please don' buy this product Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Colour:As Shown Material:Plastic+Metal Package Contents: 1 * -40 High Voltage Probe Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.