Features Signal Generator --- A handheld digital signal generator that supports three power supply methods, making it more convenient to use. Stable Working --- Voltage and current regulation can be switched with 1 click, and independent wiring can be used for simultaneous output. Easy Operation --- Supports two modes of coarse and fine tuning, with adjustable turns and easy operation. Equipped with a 4 bit high brightness digital tube, supporting high accuracy adjustment and adjustable output. With High Safety --- The output has short circuit protection, and the power supply has reverse connection protection, ensuring safety and reliability. Convenient Use --- Adopting pluggable wiring terminals, it is easy to install, stable in performance, and easy to carry. Specification: Item Type: Current Signal Generator Model: Q03H01B Power Supply: AC 220V, 85-264V AC, DC 24V 5W. Range: 85V~264V or 110v~370V, 24v ± 10%. Current Output Adjustable Range: 0-22mA, 4-20mA in default. Input Feedback Accuracy: < 0.05ma. Internal Sampling Resistance: 10 Ω. Output Control Accuracy: < 0.05ma. Load Sampling Resistance: ＜ 500 Ω. Working Environment: 0-40℃, relative humidity <80%. Communication: RS485 Switch: One way relay, 10A, 250V AC 30V DC.  Package List:1 x Current Signal Generator Package List 1 x Current Signal Generator