Professional 4.5-digit multimeter(39999 count Max), offering fast and accurate measurements.Equipped with a high-precision 5ppm reference source, ensuring long-term stability. Innovative 3-hole design for fully automatic current measurement in ??A/mA/A ranges. Ultra-fast continuity testing, innovative diode function with multiple voltage drop measurement and with distinct audible indicators. AC+DC mixed measurement (DM40B), displaying both AC and DC components simultaneously.Supports auto-measurement, relative measurement, data logging, data hold, and trend graph. High-resolution IPS touchscreen design for fine display and convenient interaction.10-bit ADC, 50MHz sampling rate, 10MHz bandwidth, and a built-in signal generator. Note:The colors of cables/accessories are random, and the designation is not accepted. The appearance is slightly different and does not affect the use. Specification:I: DM40B Basic Edition Colour:Yellow Material:plastic Package Contents: 1 * DM40 host 1 * USB to type-c cable 1Pair * MP01 multimeter universal test leads 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.