1、Strong thrust and lightweight, smoothly operation and low noise design, convenient to use. 2、About 27.5 x 18.5mm / 1.1 x 0.7in of the motor size and 4mm / 0.16in axle diameter, wonderful accessory. 3、Easy and convenient for installation and disassemble, reliable and durable to use. 4、Practical RC model modification accessory, improving comprehensive performance. 5、Wonderful replacement for the old or broken FPV racing motor, directly fitment. Item Type: Motor Material: Metal Color: Black Green Motor Size: Approx. 27.5 x 18.5mm / 1.1 x 0.7in Axle Diameter: Approx. 4mm / 0.16in Operating Temperature Range: -0℃ ~ + 80℃ Motor Type: Brushless motor with outer rotor, three-phase motor Speed (RPM) : 0 ~ 1900PRM / 1V A2207.5-1900KV Motor Maximum Tension: 1959g (6S/GF6045 2R) Input Voltage: DC7.4-24V (2-6S) Current: 45.38 A Recommended ESC: 30A ~ 45A Maximum Power: 1065W Recommended Blade: 5 ~ 6 inches A2207.5-2500KV Motor Maximum Tension: 1590g (4S/GF6045 2R) Input Voltage: DC7.4-16V (2-4S) Current: 43.55 A Recommended ESC: 30A ~ 45A Maximum Power: 709W Recommended Blade: 5 ~ 6 inches A2207.5-2750KV Motor Maximum Tension: 1640g (4S/GF6045 2R) Input Voltage: DC7.4-16V (2-4S) Current: 56.93A Recommended ESC: 30A ~ 60A Maximum Power: 910W Recommended Blade: 5 ~ 6 inches Application: FPV Racing Drone Usage: Use ESC to adjust PWM signal for control, PWM adjustment range 900-2100us 1 x Motor 1 x Adapter 4 x Screw