1. Versatile and precise: this precision portable 010V/5V voltage and 0420mA current signal generator provides multiple output ranges (factory setting is 010V/020mA) and display modes. 2. Advanced ProtectionThe adjustable signal generator features short circuit protection for output, reverse polarity protection for power supply, and overcurrent protection during battery charging/discharging. It also includes an automatic charging management system with a power indicator. 3. Durable MaterialThe analog current voltage simulator boasts a thin matte nonslip shell for comfortable handling, an elegant aluminum alloy knob, and electroplated buttons, combining aesthetics with functionality. Made from durable polypropylene, it measures 100 x 60 mm. 4. FunctionEquipped with a 4digit bright digital tube for precise settings (accuracy of 0.01), the output can be calibrated (without battery).