Features: 

RC CH3 Controlling flashing Mode 

Aluminum alloy, very durable and good quality 

Using receiver as power supply 

Suitable for 1/10 1/8 RC Rock Crawler Rally

Specification: 

The use of voltage: 4.8~6V 

Size: L*W*H about132mm*102mm*25mm

Method of use: the power line is connected to the receiver third channel (CH3) 

Weight: 145g 

Package list:  1 * Roof Luggage Rack with LED Lights

Note: Please check carefully if your car can install it.