[Signal Output Function] The DDS signal generator module has a signal output function, and the DDS output signal can be adjusted with the UP and DOWN buttons. [Step Frequency Setting] The DDS signal generator module has a step frequency setting function, the step frequency can be set via the internal step function, step frequency value: 1, 10, 100, 1000, 10000Hz. [High-Speed Square Wave () Output] The DDS signal generator module has a high-speed square wave () output function, the amplitude and offset can be adjusted via the knob. Offset is: 0.5pp5Vpp. [Easy to Use] This signal generator module is small in size, easy to carry and store, easy to use, and has good performance. [Material] This signal generator module is made of high-quality materials, sturdy and durable, simple in structure, easy to assemble, neat appearance, self-powered, suitable for DIY assembly. Color: green Material: PCB Size: 7x6cm Package contents: 1 * Signal generator module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.