Specifications: 1) Diameter: 4mm 2) Rated voltage: 1.3V DC 3) Rated current: 125mA max. 4) Rated speed: 11,000 +/- 2,500rpm 5) voltage Range: 1.1-1.5V DC 6) Stall current: 145mA max 7) Applications: widely used in mobiles,tooth brushes... 8) Weight: 1.2g