This is the 1/10 scale KC HiLiTES High Performance LED Light Bar from RC4WD.
Mounting Hole: Diameter: 0.079 (2mm)
Overall Length: 4.8 (122mm)
Light Bar Width: 3.93 (100mm)
Overall Height: 0.82 (20.9mm)
Light Bar Height: 0.63 (16.2mm)
Weight: 1.62oz (48g)
Includes: KC HiLiTES High Performance LED Light Bar with Wire Lead and Receiver, Connector and KC HiLiTES Decal Sheet