The generator uses the encoder to adjust the current and voltage output and modify the parameters. The encoder button is used to move the cursor. Press the button once, the cursor moves to the upper position by one bit (with a flashing prompt), and the cursor position is used to indicate the different output adjustment amount corresponding to one pulse of the encoder (0.01, 0.1, 1, 10 (mA or V)). Features: The generator with battery is powered by lithium battery, which can be chargeable. When the battery is undervoltage, the undervoltage indicator lights will be up, please turn off the generator and charge the battery in time. If the generator is not used for a long time, charge at least every 2 months to prevents battery damage. MICRO USB powered and charged. 1Current Output The current output encoder is rotated to right, the output is increased and it is rotated to left, the output is decreased. You can change the position of the cursor by the encoder button to change the different output increment and decrement (0.01mA, 0.1mA, 1mA, 10mA). 2Voltage Output The voltage output encoder is rotated to right, the output is increased and it is rotated to left, the output is decreased. You can change the position of the cursor by the encoder button to change the different output increment and decrement (0.01V, 0.1V, 1V, 10V). 324 Voltage Output 24V will be output directly when powered on. 4Output Correction Press and hold the current output encoder button for more than 2s to enter the correction interface. The current output correction range is 9.99 percent , and the voltage output correction range is 9.99 percent . The corresponding current and voltage values can be corrected by rotating the corresponding encoder. Press the voltage encoder button, the settings will be saved and press the current encoder button, the setting will be canceled. Note: Due to the output chip limit, the minimum output voltage and current cannot be 0 Specifications: Name: Signal Generator Active current output: 0-22 mA (the minimum output is about 0.06mA), load: 0-550 Passive current output: 0-22 mA (the minimum output is about 0.06mA), external power supply up to 30V, load: 0-550 Voltage output: 0V-12V (the minimum output is about 0.05V) 24V voltage output: drive current: 35mA (Do not more than 35mA) Operating environment: 0C-50C without condensation Item size: 90 x 70 x 28mm or 3.54 x 2.76 x 1.10in Package size: 150 x 100 x 80mm or 5.91 x 3.94 x 3.15in Package weight: 120g or 4.23ounce Package list: 1 x Signal Generator Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.