FeaturesThis 92 mm model of the Deep Silence fan series is equipped with a 4-pin PWM connector for automatic adjustment of the fan speed. The rotary speed spectrum ranges from 400 to a maximum of 1,400 rounds per minute. The Deep Silence 92 mm PWM 1400 generates an air flow of up to 23.6 CFM at a noise level of not more than 13.7 dB(A). A set of fan shock absorbers as well as a set of fan screws is included.