1. Frequency output range: 23.5-6000Mhz. There are two modes of frequency and frequency sweep 2. Minimum control accuracy: 0.001Mhz. 3. Amplitude control: -4dB-ldB +2dB +5dB 4. Power supply mode: USB 5V power supply 5. Control : a Adjust the frequency output through the 5 buttons on the board b Serial port control mode 1: onboard usb to serial port chip, the computer can directly Direct control, no control software c Serial port control mode 2: through the serial port interface of the board, set by other hardware equipment control, d can provide serial port control communication protocol Please Note: Due to different batches, there may be differences in product appearance, color and printing, which will not affect the use Colour:green Material:PCB Size:80mm x 53mm x 8mm Package Contents: 1 x Signal Source 1 x USB Cable 1 x Serial Port Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.