Usage Tips:Features: 1. 3.8mm high-quality terminals, long-term non-slip wire plug-in type for easy wiring 2. Various tests: lithium battery power supply accuracy test, DC24V power supply accuracy test, USB power supply accuracy test 3. One machine in hand, worry-free on site.Coarse and fine-tuning dual-mode travel circles can be set.High precision 0.01 adjustable and calibratable 4. Is easy to debug. High-grade knob cap electroplating button 5. Widely used in: mitters, secondary inst ents, PLC control cabinets, valve positioners, industrial automation DCS systems, etc. Product parameters: A Power supply mode: external power supply DC15‐30V, external microUSB‐5V B. Voltage output: 0-10V adjustable, the accuracy after calibration is 0.01V, the maximum current is 20mA C. Current output: 0-22mA adjustable, the accuracy after calibration is 0.01mA, the load equivalent resistance ≤ 500 ohms D. Power consumption parameters: external power supply DC15-30V, power 1W (not charging)/5W (charging) External microUSB‐ 5V, current 0.2A (not charging)/1A (charging) e display elements: 4-digit 0.4-inch digital tube E. Setting button: rotary encoder, 20 pulses per circle F. Optional type: only USB/DC24V power supply model without lithium battery / built-in lithium battery model Precautions: 3 power supply modes, only 1 channel can work, and can also be connected at the same time Material: plastic colour: As shown Package Contents: 1 x Signal Generator 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.