Specification: Item Type: Current Voltage Generator 3 Power supply methods, charging with mobile phone charger, charging bank or external 24V: External power supply DC15-30V, Power: 1W(not charged) or 4W(charged) External microUSB-5V, Current: 0.2A(not charged) or 1A(charged) 1. The voltage output is adjustable from 0-10V, and the accuracy after calibration is 0.05V. Maximum current 22mA 2. The current output is adjustable from 0-22mA, and the accuracy after calibration is 0.05mA. Current sampling resistance is not greater than 500ohms 3. Digital tube display 4 digits, two decimal places 4. Encoder knob 1 turn pulse count 20 Package List: 1 x Current Generator 1 x USB Charging Cable 4 x Jack Test Crocodile Clip 4 x Jack Test Crocodile Clip Socket 1 x Screwdriver 6 x Terminal 1 x User Manual