This is the Castle Creations Short Course Race Pro System with the Mamba Max Pro SCT ESC and 3800kV Brushless Motor. FEATURES: Extreme performance for 2WD short course and CORR vehicles running with 2S LiPo power (maximum vehicle weight should not exceed 6.5lbs (2.9kg) Also ideal for racing 4WD SCT/CORR vehicles on 2S in high temp environments Four pole design Neu-Castle 1410 3800kV motor Mamba Max Pro ESC offers switching BEC that powers radio and servo all the way up to the 6S maximum input, is Castle Link compatible (USB connector sold separately), and offers low voltage cutoff, proportional brake with adjustable curve and reverse with lockout Blower fan plugs into receiver for power and drops motor temperatures as much as 30 degrees One year limited warranty on both components beginning at date of purchase INCLUDES: Mamba Max Pro SCT ESC and 3800kV Brushless Motor with Connectors REQUIRES: Installing in vehicle and connecting to battery and receiver SPECS: Mamba Max Pro ESC (CSEM6600); Cell Handling Capability: up to 6S LiPo Brake: Proportional with adjustable curve Reversible: Yes, with lockout Low Voltage Cutoff: Programmable Size: 1.79 x 1.44 x 0.85" (45.5 x 36.5 x 21.5mm) Weight: 2.8oz (81g) with wires Connectors: 4mm bullet 1410 Motor (CSEC3600); Shaft Diameter: 0.20" (5mm) Can Diameter: 36mm Can Length: 53mm Connectors: 4mm bullet COMMENTS: This system can only be used with a 2S LiPo battery when using the stock gearing of the vehicle. A 3S LiPo can be used, but the gearing of the vehicle must be changed to handle the increased power output. jxs 09/15/11 ir/jxs