Features: This ADF4351 signal source development board has well designed circuit board layout. Wide-voltage: It is a phase-locked loop module with integrated key-operation, wide-range voltage-supply, and fine human-computer interaction interface. Multifunction: The module can realize the frequency output of 35MHz-4.4GHz, basic functions such as point frequency, frequency-sweep, frequency hopping. It can be controlled by the upper computer official software. All control-pins are leaded out for convenient operation. Three-wire serial-peripheral-interface bus lead to control pin and state locking pin, allowing all functions including point frequency-sweep and frequency hopping. Specifications: Material:ABS Size: Approx.3.8x3cm/1.49x1.18inch 2.2GHZ--4.4GHz sine-wave (fundamental) 35MHZ--2.2GHz squarewave (fundamental division) Output signal: output speeds, signal strength: + 5dBm (programmable) RF connector: SMA-female-head Control Interface: Three-wire Serial-Peripheral Interface Bus Reference Clock: 10.000MHZ (default), through the interface to an external-SMA Package Includes: 1x RF Signal Source note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.