Thank you Steve and Robin for your answers so this servos im not quite sure were to find their datasheet, becouse they are borrowed, and they are called U-Servos, so when i google this servos it seems these are from a company that makes robotic arms know as UFactory. but funny fact it appears they have a shield specifically for this servos and this shield works with 5V-5A (lol) so i hope it doesn't appear any problem.