High performance, low cost Supply voltage: +24~+90VDC Output current: 2.8~7.7A Logic input current: 6mA~30mA Inaudible 20khz chopping frequency TTL compatible and optically isolated input signals Automatic idle-current reduction 14 selectable resolutions in decimal and binary Microstep resolutions up to 51, 200 steps/rev Suitable for 4, 6, 8 lead motors Over-current, over-voltage and short-circuit protection Small size Environment: Avoid dust, oil frost, and corrosive gas Operating Temperature: 0--50 degree Celsius Humidity: 40--90%RH Vibration: 5.9m/s2Max Storage Temperature: -20--+65degree Celsius Weight: About 1kg Dimensions: 119x97x48mm RoHS compliant version P808 is available, the specifications are the same.