?Description : <br>3V 0.22A Micro DC Coreless Vibrator Motor 4mm x 12mm<br>Outside of a motor is made of engineering plastics shell｣ｬ inside in addition to the outer box to accommodate the eccentric wheel  to rotate at high speed｣ｬ there is also a small DC motor｣ｬ drives the eccentric wheel to rotate. In addition there is a very simple integrated circuit to control the start and stop operation of motor.<br>When the mobile phone is set to &amp;quot;vibration&amp;quot; state｣ｬ the control circuit is switched on.When received a text message or a call｣ｬ motors drives the eccentric wheel to do high-speed rotation｣ｬ resulting in motion.<br>This is the new coreless motor｣ｬ though small｣ｬ but the vibration force is also good.<br>Specifications : <br>Current : DC 0.22AVoltage : 3VMotor Size : 4mm(diameter)*12mm(height) (not include eccentric wheel)Total length : 18mm<br>Package included : <br>1 x Micro Cell Phone DC Coreless Vibrator Motor<br>Details pictures :