Item Type: DC Micro Brushless Servo Motor. 1 x DC Micro Brushless Servo Motor. 12V no‑load speed is about 3100 rpm, 24V no‑load speed is about 6100 rpm. The motor is short. Optional Type: 12V, 24V. This DC motor has a built‑in driver and a 100‑line dual‑channel encoder.
eBay