This is the brushless electric powered, 2.4GHz radio controlled, ready to run HPI Savage XS Flux Mini Monster Truck. FEATURES: Chassis: Rigid 6061-series aluminum TVP (twin vertical plate) Drive: Four wheel shaft Brushless Motor: HPI Flux Vektor 4000 with aluminum motor plate Radio: HPI TF-40 2.4GHz with the SF10W waterproof steering servo, 3ch receiver with fail safe Electronic Speed Control: HPI Flux Vapor Pro with reverse and cooling fan, programmable with optional Programming Kit (HPIC0573), not included Transmission: All metal gears running on rubber-sealed ball bearings Differential: Equipped with four machined super heavy duty bevel gears Slipper Clutch: Dual pad Spur Gear: Constructed of steel 28 tooth, 48 pitch Wheels: HPI Warlock, chrome finish, width: 2.2" (56mm), 2.2" (56mm) diameter Tires: GT-2 on/off-road with blocky tread pattern and heavy-duty sidewall teeth, 3.93" (100mm) diameter, 2.3" (60mm) wide Shocks: Plastic bodied, oil filled Caster: Adjustable front and rear toe-in, caster/toe-in refers to the angle of the front suspension when viewed from the side of the car Camber: Adjustable, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle Body: Trimmed and painted GT2XS Warranty: Two year limited warranty through HPI beginning at date of purchase. Warranty valid only in the USA, Canada and South America INCLUDES: Assembled HPI Savage Flux Mini Monster Truck with Flux Vektor 4000 Brushless Motor, Vapor Pro ESC, HPI 2.4GHz Radio System, SF-10W Waterproof Steering Servo, Painted & Trimmed Body and Instruction Manual REQUIRES: AA Batteries: Eight for transmitter Battery: 2S or 3S LiPo Battery Charger: LiPo compatible Building and track equipment SPECS: Vehicle- Length: 14.1" (360mm) Width: 11" (280mm) Wheelbase: 8.8" (225mm) Body- Length: 13" (330mm) Width: 5.7" (146mm) at widest point Height: 3.7 (93mm) COMMENTS: For Replacement Ball Bearings use: Qty. Size Location Qty. Bearing Set 4 5x11mm Fr Uprights 2 DTXC1547 2 5x11mm Fr Gearbox 1 DTXC1547 2 5x11mm Rear Gearbox 1 DTXC1547 2 10x15mm Fr Diff 1 DTXC1595 2 10x15mm Rear Diff 1 DTXC1595 1 10x15mm Center Shaft 1 DTXC1595 2 5x11mm Idler Gear 1 DTXC1547 jxs 08/22/11