Start up instructions: Dim light (at night) car stops no flashing Conditions: strong light (daytime) vehicle driving LED light does not flash Dark light (at night or in the tunnel) car driving only when the light is dark + the car will be bright when driving (light + shock) the car will automatically turn off after 120 seconds of standstill 8 LED beads, four color light warning. Anti-build antenna design, LED shark fin solar warning light Multi-color selection, appearance through paint process, corrosion resistance, aging resistance High efficiency light plate is used, no external power supply is required Specifications: Size:15x6x7cm Material:Plastic Color:Black,White,Gray,Gold,Blue,Silver,Red Package Contents: 1Pc Shark fin warning light Note: 1.This product can not replace the original car antenna, is a copy of the antenna modeling production.There is no radio function. 2.For the first use, please press the red switch button at the bottom to confirm that the light is on and paste the installation after no problem