It's a Cellphone micro vibrator motor. This micro vibrator operate on 1v to 4.2v and its current rating is 66mA. The speed for this motor is 12000rpm. This type small vibrator motor generally use mobile phone for silent function in vibrate mode and for robotics for indicating some signal, and in DIY project.
(Note: Product Image are shown for illustrative purposes only and may different from the actual product)