Fangrui Product Details Upgrade The Multifunctional Mini Handheld Digital Signal Generator. Using High-grade Aluminum Alloy Knob, Ultra-thin Frosted Non-slip Shell, Light And Portable, It Can Be Used For Plc And Panel Debugging, Continuous Speed Regulation Of Servo Motor Forward And Reverse, Equipment Testing, Frequency Converter, Etc. Signal Generator Voltage Output: -10v~+10v, Accuracy 0.01v, Easy To Debug Forward And Reverse; Current Output: 0-22ma, Accuracy 0.01ma, Error Can Be Calibrated. Signal Generator Built-in 3.7v 1000mah Lithium Battery, Easy To Use, And Has A Power Indicator. Analog Generator Is A Full-featured, Highly Practical, Cost-effective Handheld Function Generators Developed For People In The Maintenance And Rd Industries,it Can Be Used For Plc And Panel Debugging, Device Testing, Frequency Converter And Ect. 4-20ma Signal Generator One-key Switching Of Voltage And Current, Independent Wiring, Simultaneous Output, Output With Short Circuit Protection, Power Supply With Reverse Connection Protection,store