Upgrade to a multifunctional mini handheld digital signal generator. Features a high-quality aluminum alloy knob, ultra-thin frosted non-slip shell, lightweight and portable. Ideal for PLC and panel debugging, continuous speed control of servo motors (forward and reverse), equipment testing, frequency converters, etc. Signal Generator Voltage Output: -10V~+10V, accuracy 0.01V for easy forward and reverse debugging. Current Output: 0-22mA, accuracy 0.01mA, with 5% error calibration. Built-in 3.7V 1000mAh lithium battery for convenient use, with an indicator light. This analog generator is a full-featured, practical, and cost-effective handheld function generator designed for maintenance and industrial professionals. One-button switching between voltage and current, simultaneous output, short-circuit protection, reverse connection protection for power supply. Stores the last output value upon shutdown. Simply press the knob to save. Upon next startup, it will retain the manually saved value. Easy to use, confusion-free, and simple to debug. Material: Aluminum Alloy Color: Random Color (Specific color not guaranteed) Package Contents: 1 set x Signal Generator