This is the Tazer Twin Sensorless Brushless Motor System for use with 1/10 scale 2WD vehicles. The Dynamite Tazer Twin 2-1 System combines the motor and ESC inside a single aluminum case specifically designed for the task. With the speed control and motor combined, Dynamite has been able to improve performance and reliability by making a simpler system, composed of fewer components and electrical connections. The Tazer Twin System is very easy to install and operate, making it the perfect upgrade for all 2WD brushed 1/10 scale vehicles. The unit is fully programmable and waterproof to keep the fun going in all environments. 2-in-1 Motor/ESC Unit for 2WD 1/10 scale cars. Dynamite Sensorless Brushless Technology. Designed for LiPo and NiMH batteries. High performance 4-pole motor. 3 Different Mounting Positions. CNC Machined aluminum case with high efficiency cooling. Forward/brake, forward/brake/reverse and forward/reverse (crawler) function modes. High Grade Silicone Wires. Battery low voltage cut-off system. Status control by LED and audio tone. Plug & Play: no soldering required, easy setup. High current EC3 connector. Specifications: Type : 2 in 1 Brushless motor/ESC combo Wire Gauge : 14AWG Voltage : 4.5-8.4V RPM/Volt (Kv) : 3000Kv Continuous Current : 45A Overall Diameter : 1.42 in (36mm) Overall Length : 2.28 in (58mm).