Fangrui Product Details Advanced Frequency Control: The Si5351a Module Offers A Highly Precise Clock Signal Generation, Adjustable From 2.5khz To 200mhz, Suitable For Various Rf Applications Versatile Use: For Use In Amateur Radio, Telecommunications, And Other Electronic Experiments Where Precise Timing Is Crucial Supply Voltage: +5v Output Frequency F0=f1=2.5k To 200mhz F2 And F1 Share A Phase-locked Loop, Configurable Frequency Division Ratio Output Interface: Sma Female Configurable Minimum Step: 1hz (equipped With Stm32+1.3-inch Tft) The Product Appearance And Printed Words May Vary Depending On The Batch, But This Does Not Affect Use Color: Random, No Designation Accepted Material: Pcb Package Contents: 1 X Si5351 Module 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.