High performance, yet low cost Supply voltage: +14~+40VDC Output current 0.25~2.0A Logic input current: 6mA~30mA Inaudible 20khz chopping frequency TTL compatible and optically isolated input signals Automatic idle-current reduction Mixed-decay current control for less motor heating 14 selectable resolutions in decimal and binary Microstep resolutions up to 25, 600 steps/rev Suitable for 4, 6, 8 lead motors Over-current, over-voltage and short-circuit protection Environment: Avoid dust, oil frost, and corrosive gas Operating Temperature: 0~50degree Celsius Humidity: 40~90%RH Vibration: 5.9m/s2Max Storage Temperature: -20~+65degree Celsius Weight: About 0.3kg Dimensions: 95x76x44. 5mm