This is Spektrum RC Firma 100 Amp Brushless Smart ESC and Motor Combo. This powerful brushless combo offers a 6500kV motor paired with a specifically tuned for 1/10 scale stock and pro 2S no prep drag racing 100 Amp ESC. Making it an excellent easy plug and race option for replacement, upgrading or starting a new build. Features: Smart all in one telemetry Powerful 23-bit ARM M4 processor High RPM performance motor and ESC Easy programming with multiple methods (Smart Transmitter/Smart programming box/Smartlink USB) Compact design to fit most applications Ready to install with no soldering needed High heat resistant IC5 connectors Aluminum heat sink with a cooling fan for high efficiency Multipoint protection (Over-current/Thermal/ Failsafe/LiPo low-voltage cutoff) Waterproof design Specifications: Motor: Type: Brushless/Sensorless Length: 1.7" (43mm) Outer Diameter: 1.41" (36mm) Weight: 4.9oz (136g) RPM/Volts: 6500kV ESC: Firma 100 Maximum Burst Current: 650A Maximum Continuous Current: 100A Forward: Yes Reverse: Yes Brakes: Yes Programmable: Yes Adjustable Timing: Yes Connector Type: IC5 Output Connector: 4mm bullets BEC Continuous Current: 4A BEC: Yes 6V-7.4V Input Voltage: 2S-3S LiPo/ 5-9 Cell-NiMH Includes: (1) Spektrum Firma 100Amp Brushless ESC (1) Spektrum Firma 6500Kv motor (1) Sticker sheet and mounting tape (1) Product manual