Description: Regardless the throttle stick position, the motor will not after battery connected. Multiple procedure methods supported: transmitter stick, LED procedure Card. Compatible with Lipo and NiMH battery. Timing can be changed to be suitable for different brushless motors. Low voltage cutoff protection / Over-heat protection / Throttle signal loss protection. Specification: 40A ESC Specifications: Current: 40A Output capacity: continuous current 40A, short-time current 55A (not less than 10 seconds) Power input: 2-4 lithium batteries(Not Included) BEC output: 5V@3A (linear regulator mode - linear mode) Maximum : 210,000 rpm for 2-pole motor, 7000 rpm for 6-pole motor, 35,000 rpm for 12-pole motor Size: Approx. 68x25x8mm/2.68x0.98x0.31inch 2217 Motor Specifications: Dimension: 27.8x32mm/1.09x1.26inch Weight: 68 g Shaft Diameter: 4 mm Accessories: 4.0mm prop adapter, motor mount, screws Prop Recommendation: 2217-1100KV: 11 or 10 inch props, eg. 1155, 1070, 1060, etc. 2217-1250KV: 9 inch props, eg. 9050, 9045, 9060, etc. 2217-2300KV: 6 inch props, eg. 6040, etc. Package Includes: 1 Piece 40A ESC 1 Piece 2217 Brushless Motor Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.