Description: Features Power supply External DC15 30V USB 5V with emergency AC transformer AC12 24V support Only version B is equipped with a rechargeable lithium battery One key switching between voltage and current regulation modes with independent wiring and simultaneous output capability Current output supports 2 3 4 wire systems fully compatible with active devices Short circuit protection on outputs non polarized power supply connection and DC bridge isolation protection Multiple output ranges ±10V ±5V 0 10V 2 10V 0 5V 1 5V 0 3 3V 0 2 5V 0 1V 10V 0V for voltage 0 20mA 0 22mA 4 20mA for current Multiple display modes actual value percentage 0 100 0 and frequency 50Hz 1 1500Hz Dual adjustment modes coarse and fine tuning with configurable step values Lithium battery protection overcurrent protection during charge discharge automatic charging management power indicator and voltage display 360 degree encoder knob for stepless adjustment long lasting and unaffected by temperature humidity High brightness 4 digit display with two decimal places output calibration capability High grade aluminum alloy knob plated buttons aesthetic shell comfortable grip 2mm banana jacks for easy installation compact and portable design Specification Working Voltage DC24V Range DC15V 30V Working Current 1W USB Input microUSB 5V 0 2A not charging 1A charging Voltage Output 0 10V adjustable accuracy ±0 01V max current 20mA short ci