HOBBYWING HWI38020312 XERUN AXE 540L R2 Brushless System Crawler AXE 540L-2100KV-R2 Motor Combo. All items we sell are brand new in factory sealed packaging! XERUN AXE 540L R2 Brushless System for Rock Crawler w/ AXE 540L-2100KV-R2 Motor, Combo. XERUN AXE R2 FOC ESC Specification. Input Voltage: 2-3S LiPo, 6-9S NiMh. BEC Output: 6V/7.4V Switchable, Continuous Current of 6A (Switch-mode). Programming Port: Built-in Bluetooth. Firmware: iOS or Android smartphone (installed with the HW LINK app). Size / Weight: 47.4(L)x36.2(W)x26.5(H)mm/ 108g (Included input wires). XERUN AXE 540L Motor-Specification. 1/10-1/8th FOC brushless motor (Patented), Waterproof. Motor Diameter: 36.0mm(1.42in). Length (mm): 57.8mm(2.28in). Shaft Diameter: 3.175(0.125in). IMPORTANT Note: Xerun AXE series is a closed-system: Due to its advanced technology, HOBBYWING Xerun AXE ESC works exclusively with Xerun AXE brushless motor. What’s in the box: 1x AXE R2 FOC ESC 1x AXE 540L FOC motor. FOC (Field-Oriented Control) for Super Linearity, High Torque, & Quiet Operation. Chip-type magnetic encoder guarantees consistency between three phases for pure and precise rotor position signals. Polarity Protection: This is not a typo. No more “oops” moments. The waterproof design (IP67 standards) allows the AXE brushless power system to be used in all weather & track conditions (conditions should be monitored closely when running in muddy, wet, or adverse conditions). Closed-loop control for intelligent torque output & consistent motor RPM under all loads. Adjustable drag brake & drag brake rate control with the maximum drag brake of up to 200% (that’s nearly twice the drag brake of standard brushless systems) can provide unprecedented parking capacity on slopes, with no jerky stops. Innovative built-in Bluetooth connectivity allows users to read ESC data or update ESC firmware via a smartphone (installed with the HW LINK app). Hobbywing’s “staggered pole” patented motor with 4 poles & 12 magnets, has zero cogging effect & torque ripple. This greatly improves the maneuverability at low speeds. The sensor harness features a plug-and-screw design, with a silicone O ring inside. This not only provides a firm connection between motor and ESC, but solves the “waterproof” challenge for sensor ports. The advanced and secure electronic switch features a waterproof, dust-proof, and shock-resistant design. Multiple protections: low-voltage cutoff, thermal, fail-safe (throttle signal loss), motor lock-up, and overcurrent. International Buyers – Please Note. We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior. Small Flat Rate Box or Small Box – 2 POUNDS. ORDERS – Carrier is up to our discretion.