1, Working voltage rating: 4f+0.5V 2, Working pulse width rating: fa80MS 3, Rated working pulse interval: fa50MS 4, Coil resistance: 430f+5%ohm (23f|f+2f|) 5, Velocity ratio: 100:1; 200:1; 400:1; 800:1 6, Stepping angle: 3.6; 1.8; 0.9; 0.45 degree 7, Step motor driving torque: 30u Nm 8, Specifications (quantity of character 5+1(five integers with one decimal) wheel): 6+1(six integers with one decimal) 9, Character wheel material: PC 10, Rotating direction of character wheel clockwise rotation only 11, Lead length 130mm 12, Range of working ambient temperature: -40f|-70f| 13, Variable-speed gear material: polyoxymethylene 14, Base frame material: 1. aluminum alloy base frame: LF2-YZ 2. plastic base frame: PC 15, Motor stator material: ferronickel alloy 16, Shielding cover material: low-carbon steel shielding cover 17, Error-free working period: faone billion pulse 18, Installation dimension: upper fitting hole space: 24.5*35mm lower fitting hole space: 30.5*30.5mm. In foam tray of 50pcs, 5 foam trays to a carton. Dimension of carton:40*28*42.5cm.