Liquid RC PO Box 3173 Nashua, New Hampshire 03061 United States of America. Spektrum XSEMC19 Firma Smart Sensored Motor/ESC 4500Kv Sensored Motor Combo. Brand new item, sealed in original retail packaging. 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. Smart technology is both simpler and superior! Smart all-in-one telemetry Fast, powerful 32-bit ARM M4 processor Ready to install no soldering required Multiple options for easy programming: Button programming Smart ESC Programming Box SmartLink USB Updating and Programmer application Multi-point protection: Over-current protection Automatic. WARNING: This product contains a chemical known to the State of California to cause cancer. Please, check your mailing address! I will not change your address after the sale is made. School children know their address, you should too. Save for later: Add to My Favorite Sellers and Stores. Other items: Lots of other parts are available. Always: Have fun enjoying your models. Item weight: 1.3000 pounds.