Brand new Operates voltage: 2.5 – 4.0 VDC Rated voltage: 3.0 VDC Operating environment: -20 to +60 degree centigrade Save environment: -30 to +70 degree centigrade Rated rotor speed: 12000+/-2500RPM Min Rated current: 70mA Max Starting current: 90mA Max Starting voltage: 2.3V DC Max Insulation resistance: 10Mohm Min Terminal impedance: 30 ohm+/-15% (single-track) , 60 ohm +/-15% (bi-directional) Direction of rotation: arbitrary direction Can be operated in either direction, simply reverse power supply polarity Dimensions (including shaft with weight): 0.433"(L) * 0.185" diameter Made for vibration alerts in cell phones and pagers Comes with a removable rubber boot with two leads