The Spektrum Firma Sensored 2-in-1 System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Field-orientated Control FOC and professional drag brake performance and torque control. Spektrum SMART Firma 2 in 1 Brushless Crawler Motor/ESC: 1400Kv, SPMXSEM1040A. 2-in-1 ESC Motor Combo: Compact option for detailed scale builds where space is limited. Advanced Sensored Motor Control: Great for slow speed driving and next level drag brake performance. Industry Leading Waterproof Design: The Firma 2-in-1 Brushless Crawler Motor/ESC provides industry leading waterproof and dustproof operation for worry-free driving in mud, sand, snow and water. Automatic LiPo low-voltage cutoff. Pro-level Drag Brake performance and adjustability. FOC (Field-Oriented Control) equipped. Integrated 40-amp ESC (160amp burst). 2-3S LiPo/6-9 Cell NiMH input voltage range. Industry Leading Waterproof Design. Fully programmable with optional Spektrum ESC Programmer Box (not included). Developed and designed by Spektrum. Compact for easy installation in most applications. Ready to install – no soldering required. Adjustable high-power BEC (6V or 7.4V). Firmware updatable through the Spektrum ESC Programming Box. High heat resistant IC3 connectors, backwards compatible with EC3 connectors. The Ultimate Compact Crawler Solution. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control, all while being fully waterproof. The compact 2-in-1 design grants builders the ability to reduce clutter and components, giving you the most room for scale accessories and customization. The integrated design makes the size similar to a 550 can size motor, making it a easy drop-in option for most 1/10 scale crawler, scaler and trailer models. Available in a low speed 1400Kv option for extreme slow speed and high angle of attack performance. And a high speed 2300Kv for excellent control for trailers and rock bouncers. The Spektrum Firma Sensored 2-in-1 System features a high-precision magnetic encoder and rotor position sensor that provides excellent 1 to 1 control feel when driving at any speed and at any angle. Perfectly suited for trail driving, rock crawling competitions and rock racing setups. This advancement in sensored motor control allows the ESC to match your throttle input to the motors RPM with unmatched precision. Intelligent Speed And Torque Control. The Spektrum Firma Sensored 2-in-1 System provides a closed loop control, ensuring that the esc maintains torque and RPM levels even as driving conditions change. Giving unprecedented control when driving uphill or downhill and even when in wet or loose traction conditions. No matter the terrain, the Spektrum Firma Crawler system keeps you in complete control. Maximum Power Efficiency Provides Longer Battery Life. When driving with the Spektrum Firma Sensored 2-in-1 System, drivers are better equipped for the long trails ahead. The Spektrum Firma Sensored 2-in-1 System only uses the power it needs to match your desired throttle output, providing substantially more efficient current levels and extremely long battery life when compared with similar sensorless systems. Pro-Level Drag Brake Adjustment. The Spektrum Firma Sensored 2-in-1 System features a huge range of drag brake adjustability, allowing for drivers to expertly tune their crawlers and scalers depending on their driven train and vehicle weight. Allowing up to 200% drag power, no matter the setup, the Spektrum Firma Sensored 2-in-1 System can keep your vehicle parked at nearly any incline. The all-weather, waterproof design of Spektrum. ESCs allows them to perform in nearly any terrain under almost any conditions. Firma ESCs keep you going through dust, gravel, snow, and water. Using the Spektrum ESC Programming Box (version V2 required), you can easily change settings on the trail to suit driving conditions. An easy-to-use Smart Link USB Updating and PC Programmer app is also available. We do not sell used, opened, or damaged items. Some restrictions apply based on destination and item size. We can combine multiple items if you use the shopping cart. ORM-D and Lithium / Li-Po Battery Restrictions. Products of this nature include quarts of fuel, glues, paints, thinners, aerosol sprays, and certain lithium batteries. The mounting of engines and accessories, running fuel through engines, cutting or pushing out the balsa sheets in kits, and other similar actions constitutes used merchandise. Standalone or Nickel or Alkaline batteries which have been opened, used and / or charged, due to an abundance of caution and care for our customers. Flammable or combustible materials or products (regardless of whether the item is open or unopened) such as: Nitro engines (if fuel has entered the engine), Nitro fuel, Unopened as well as opened, charged and / or used Lithium Ion / Polymer (LiPo) batteries and other Lithium-based batteries. Any type of opened, charged and / or used battery including LiPo, Nickel-Metal Hydride (NiMH), Nickel-Cadmium (NiCd), other Nickel-based batteries and / or Alkaline-based batteries. Sealed Lead Acid batteries. Paints, thinners, certain glues or cements/pastes. Aerosols or compressed gas canisters. Rockets, kits containing rockets with or without igniters, igniters, hobby fuel (both quart or gallon). When packing your order for return, please be sure all the original packing material and instruction papers and/or manuals are included. We will be unable to process your return if parts are missing, or if items are not packed properly to avoid damage to products and their boxes and/or packages. Providing an exceptional customer experience is a mission we take seriously. That’s why, when it comes to radio control (RC) fun, we don’t toy around. Our advances in model aircraft and vehicle stabilization, 2.4GHz control and ready-to-run convenience have made RC hobbies more exciting and more accessible than ever before. More importantly, we love RC just as much as our customers do. Any product that bears the Horizon Hobby name was developed by a team of in-house experts, many of whom have decades of experience in the hobby. But our commitment to a great experience doesn’t stop at the drawing board. Every Horizon Hobby product is backed by the best customer service you will find in any industry. Horizon employs nearly 700 people and sells products in more than 100 countries around the world. Corporate headquarters, along with the main distribution facility and product service center, are located in Champaign, Illinois. Additional distribution centers are located in Ontario, California and Barsbüttel, Germany (site of Horizon Hobby GmbH). California is also home to the Losi RC car division (Ontario) and the Athearn train line in Long Beach. At Horizon Hobby, we help people have fun with hobbies. That’s why, when it comes to radio control fun, we don’t mess around. We’re always striving to answer e-mails as quickly as possible.