Professional digital signal generator with 2CH(double channel). Maximum 30MHz output and 100M frequency meter. Waveform type(Comes with): square wave, sine wave, triangle wave, trapezoidal wave, exponential wave, half-sine wave, positive and negative triangular wave, ringing wave, etc. Colorful 3.2" LCD display with 320*240 pixels resolution, easy and clear for reading.Powered by 1*18650 3.7V lithium battery(not included), with battery charger for convenient charging. Can also use USB cable to connect to other mobile devices for power supply. Sine Wave: 0.01Hz - 30MHz (minimum resolution 0.01Hz)/Square Wave: 0.01Hz - 25Mhz (minimum resolution 0.01Hz)/Triangle Wave: 0.01Hz - 25Mhz (minimum resolution 0.01Hz)/Other Waveform: 0.01Hz - 6MHz (minimum resolution 0.01Hz)/Custom Waveform: 1Hz - 6MHz (minimum resolution 1Hz)/Square Wave Rise Time: ?10ns/Custom Waveform: 98 (the waveform drawn by the user himself)/Number of Waveform Points: 2048 (maximum) Vertical Resolution: 14 bits /Square Wave Overshoot: ?5% /Square Wave Duty Cycle: 0%-100% /Output Signal Amplitude Range: ?5MHz (2mV - 20V), ?5MHz?10MHz (2mV - 10V), ?10MHz?30MHz (2mV - 5V) /Minimum Amplitude: 2mV /Minimum Amplitude Increment: 1mV Output Signal Offset Range: ?500mV (±1V (total maximum)), ?500mV (±10V (total maximum))/Minimum Offset Increment: 1mV/Adjustable Phase: 0°- 360°/Minimum Phase Increment: 1°/Frequency Sweep Channel: CH1 CH2 (can be simultaneously)/Frequency Meter: Input 1Hz - 100MHz (input voltage range 200mV-20V)