High Precision Output: 0-10V/0-20mA, precision is 0.01V/0.01mA, rotate the encoder knob to adjust output voltage, can be calibrated.Power Supply: Built-in battery ,-USB-5V or external power DC 15-30V.The current output is 2 3 4 wires. Passive and active are fully compatible.Coarse adjustment and fine adjustment dual mode, the number of adjustment circles can be set.and Custom quick adjustment mode. output value when power off.Output short circuit protection, reverse connection protection, charging protection.3 Power Supply Methods: Charging with mobile phone charger, power bank or external 24V power supplyPower: 1W (Not Charging)/5W (Charging)Lithium Battery Capacity: 1000mAh, 3.7VMaximum Charging Current: 0.8AExternal: -USB- 5V, Current: 0.2A (Not Charging)/1A (Charging)Digital Tube Display Digits: 4 digits, two decimal Encoder: 20 pulses per turn of the knobPower Supply: Built-in Lithium battery 1000mAHSize: . 3.9x2.4x1.0inchColour:As shownMaterial:ABSPackage Contents:1 x Signal GeneratorOnly the above package content, other products are not included.Note: Light 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.