Unprecedented Versatility With T-Lock differentials and High-Low Transmission Only Summit™ gives you the ability to lock the differentials and shift from low to high gear right from the transmitter. No need to break from the action to swap gears or install locking parts. Tear up the trail in "high range" with a 25:1 ratio for dirt-slinging speed. When the terrain turns technical, drop it into "low range" for a 70:1 ratio and unreal climbing torque. For the ultimate in climbing traction, flip the T-Lock switch to lock the front differential. Need even more grip? Activate the rear T-Lock diff for fully-loaded 4WD power no matter which tire is gripping or slipping. 10-LED Lighting System No need to head for the garage when the sun goes down; Summit lights up the night with an integrated LED illumination system. Four bright white LEDs blaze the trail ahead, while six red LEDs show where Summit's been. The LEDs are integrated into the bumpers for durability and convenience, and the chassis-mounted wiring harness eliminates the possibility of tangles and hooked wires.