Welcome to our store! Compatible with 400-450 helicopters/airplanes or quadrotor multi-remote control helicopters. Output: continuous 30A, burst 40A, max 10 seconds. Input voltage: 2-3 lithium batteries or 5-9 NiCd/NIMh batteries. BEC: 21/5V (linear mode). Max speed: 210,000 RPM for 2-pole BLM, 70,000 RPM for 6-pole BLM, and 35,000 RPM for 12-pole BLM. (BLM: Brushless Motor) With T-connector and 3.5mm banana connector. Lightweight and convenient for installation, reliable and durable to use. Wonderful replacement for the old or broken one, direct fit. Item Type: Brushless Motor ESC Material: Alloy + electronic components KV: 1000, 1400, 2200 Maximum efficiency: 80% Maximum efficiency current: 4-10A (> 75%) Current capacity: 12A / 60s No load current at 10V: 0.5a Number of batteries: 2-3 lithium polymer batteries Motor size: Approx. 27.5 x 30mm / 1.1 x 1.2in Shaft diameter: Approx. 3.17mm / 0.1in Weight: 47 g / 1.7 oz (approx.) 30A Brushless ESC MultiCopter quadrotor X-rotor Specifications: Compatible: 400-450 helicopters/airplanes or quadrotor multi-remote control helicopters Output: Continuous 30A, burst 40A, max 10 seconds. Input voltage: 2-3 lithium batteries or 5-9 NiCd/NIMh batteries. BEC: 21/5V (linear mode). Maximum speed: 210,000 RPM for 2-pole BLM, 70,000 RPM for 6-pole BLM, and 35,000 RPM for 12-pole BLM. (BLM: Brushless Motor) With T-connector and 3.5mm banana connector Package Includes: 1 x set of motor, 1 x set of ESC Customer satisfaction is our top priority. If you encounter any issues with your product upon receipt, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.