Standard EM card reader Size: L120mm X W206mm X H24mm Color: refer to the picture Power supply: DC12V, power consumption less than 2W Working frequency: 125 KHz (support EM card) Effective distance: 40 150mm (depending on card quality) Transmission distance: less than 200m Working environment: -20°C to 55°C Relative humidity 5% to 95% Communication output: Standard Wiegand output (Wiegand 26bits and 44bits adjustable).