Multiple Power Supply Methods: This signal generator offers three power supply options: DC15-30v external power, a universal micro USB interface, and a built-in lithium battery. Choose the most convenient charging method for your needs. It features an integrated 1100mAh lithium battery. Adjustable Voltage and Current: Output voltage is adjustable from 0-10V with an accuracy of 0.01V after calibration. Current output is adjustable from 0-22mA with an accuracy of 0.01mA after calibration. The current sampling resistance is no more than 500 ohms. Parameter Saving: Save your preferred voltage and current settings by simply clicking the encoder. The generator will recall these saved values upon restart, eliminating the need for constant readjustment. A practical and convenient tool for your requirements. Compact Size: Its compact and lightweight design makes it easy to carry and use at home or on the go. 2 Types Compatible: The current output is compatible with 2/3/4 wire outputs, and the product also supports both active and passive types.