Fangrui Product Details Description: Universal Sensor For The Running Machine The Sensor To Make The Running Machine Work Properly And Measure The Speed Accurately *when The Engine Of Running Machine Stop And Appear Error Codes After The Treadmill Motor Starts For A Few Seconds, That Means The Sensor Is Fault Controller Interface Is 2 Pin *2 Types: Round Head, Flat Head Note: We Do Our To Ensure All Descriptions And Product Images Are As Accurate As Possible. Some Color Variations May Occur Between Computer Monitor. Your Understanding Will Be Highly Appreciated! Package Included: 1x Treadmill Magnetic Sensor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin