Fangrui Product Details Antenna Signal Booste Antenna Is Not Included And Needs To Be Purchased Separately The Signal Is Stronger And More Stable, Reducing Accidents And Making Flying . Used With Extended Range, The Signal Gain Effect Is More Obvious Extended Range, Suitable For Mini/2/air/spark Type:extended Range Function:enhance Signal Note:different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:black Material:plastic+copper Package Contents: 1 * Remote Control Range Extender 1 * Cleaning Cloth 1 * English Manual 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.