This is the Spektrum RC Firma Crawler Sensored Brushless Smart ESC & Motor Combo (2100kv)

The Spektrum Firma Sensored Smart ESC System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Smart connectivity, professional Drag Brake Performance and torque control, all while being fully waterproof.

Treal Hobby Traxxas TRX-4 Brass Bumper and Servo Mount Relocation Mount. Constructed from high quality heavy weight brass, this optional bumper is intended for the Traxxas TRX-4 platforms for unparalleled durability and reliability while adding 130g of total unsprung weight to lower the CG and enhance crawling performance and stability.

The Spektrum Firma Sensored ESC System is a Combo that includes a Sensored 2100kv Motor and the Firma 60 Amp Sensored ESC, providing a perfect upgrade for 10th Scale Rock Crawlers and Scalers.

Like every component in the Spektrum™ Smart ecosystem, Firma™ Smart ESCs combine "plug-and-play" simplicity with the ability to communicate with other Smart electronics — together, creating the best-performing RC system for your vehicle imaginable.

Firma Smart ESCs do much more than regulate power. They function like a virtual engineer inside your model, providing a direct path to the vital operating data you need to reach peak performance. Firma Smart ESCs give you an extra layer of confidence that your electronics are all operating at their best.

With Firma Smart ESCs, you'll be better connected to your vehicle than ever before — without installing extra components that all work independently of each other. You won't need extra wires, modules, or links. A Firma electronic speed control provides a one-wire solution for obtaining telemetry data such as RPM, temperature, battery voltage and capacity.

Firma ESCs not only gather the data but also send it to your transmitter in real time, instead of only storing it for after-run study. You're able to adjust settings as needed to boost performance on the go. The Firma Smart single-wire telemetry solution has been tested for quality and performance by the best brands in RC. Their verdict? Smart technology is both simpler and superior!

Features:
Smart all-in-one telemetry
Pro-level Performance Sensored Motor and ESC
Fast, powerful 32-bit ARM M4 processor
Multiple options for easy programming:
Smart ESC Programming Box (V2 version required)
SmartLink USB Updating and Programmer application
Programming from Transmitter via Text Gen Telemetry
Multi-point protection:
Over-current protection
Automatic LiPo low-voltage cutoff
Thermal protection
Failsafe protection
Developed and designed by Spektrum™ engineers, in partnership with the industry's leading ESC manufacturer
Compact for easy installation in most applications
Ready to install — no soldering required
Waterproof System
Waterproof sensor wire with locking plug and gasket
Aluminum heat sink for high efficiency
Includes Optional Cooling fan
Adjustable high-power BEC (6V or 7.4V)
Firmware updatable through the Smart ESC Programming Box (V2 version required)
High heat-resistant IC™ connectors, backwards compatible with EC™ connectors
Limited 1-year warranty

Specifications:
Amperage: 60A - 79A
Application: Crawling
Auto Cutoff: Yes
Battery Input Lead: IC3
BEC: Yes
BEC Continous Current: 3
BEC Type: Switchable
BEC Voltage: 6V/7.4V
Brakes: Adjustable drag brake
Connector Type: IC3
Constant Wattage: 500-749W
ESC Type: Brushless Sensored
Forward: Yes
Input Voltage: 7.4 - 11.1V (2 - 3S LiPo), 7.2 - 10.8V (6 - 9S NiMH)
Integrated ESC: No
Kv Rating: 2000-2499Kv
Low-Voltage Cutoff Programmable: Yes
Max Input Voltage: 11.1V
Maximum Burst Current: 360A
Maximum Continuous Current: 60A
Motor Class: 1/10 Scale
Motor Design: Inrunner
Motor Output Lead: 4
Motor Type: Brushless
Number of Poles: 4
Product Application: Crawling, Surface
Product Weight: 11.3oz (320g) ESC and motor combined
Programmable: Yes
Programming Options: Programming Box, Smartlink App, On Screen Text Gen
Reverse: Yes
RPM/Volt (Kv): 2100Kv
Sensor Type: Sensored FOC
Sensored: Yes
Shaft Diameter: 0.125" (3 mm)
Technology : Smart
Water-Resistant: Yes

Includes:
(1) Spektrum RC Firma 60A Sensored Brushless Smart Crawler ESC
(1) Firma Sensored 540 Brushless Crawler Motor (2100Kv)