carry and use with a DC5V power adapter 2.4-Inch TFT Colorful Screen: Easy to use with variable function buttons and rotary encoder Basic function waveforms including sine wave, triangle wave, square wave, sawtooth wave, and pulse wave with adjustable duty cycle Minimum frequency of output signal stands at 0.01Hz 10 Groups of parameter storage bits from M0 to M9. Automatically recall the data of M0 when it is powered on Waveform frequency resolution is 0.01Hz, and its amplitude resolution is 10m 2 Trigger Modes: Manual and external triggering modes. It can output any pulse train from 1 to 999999.The duty cycle adjustment of pulse wave is accurate to 0.5% Powerful communications function: completely open communication protocols makes secondary development easier - After connecting to your PC, the PC can be used to control the instrument