The airflow has 0.21 m3/min. (7.1 CFM) to 3.8 m3/min (134 CFM) with 38 - 40 - 52 - 60 - 70 - 80 - 92 -120 mm square size. It has a pulse sensor and PWM control function. The expected life is 30000 to 60000 hours (at 60°C with 90% survival rate). The product advantages are: large air flow and high static pressure, energy saving and low noise. The power consumption has been reduced by -15% to -55% and the noise by -3 to -7 dB(A) at the same air flow condition, compared to current model. It has speed control and pulse sensor.