TTC-SC21/V3(+) Plus version (built-in rectifier) double fan specification outline dimensions: 320 x 156 x 34 mm Fan dimensions: 140 x 140 x 25 mm x 2 Rated voltage: 12V DC / AC Rated current: 1A Power consumption: 13.2W Rated speed: 600. ~ 22 00 rpm Airflow: 76.4 ~ 280 CFM static pressure: 0.05 ~ 1.0 inches H & sub2; O Noise level: 7 ~ 32 dBA Bearing type: Z-AXIS Lifetime: 60,000 hours Power Cable Length: 6M Controller Dimensions: 87 x 40 x 6.7 Battery type: CR2025 battery voltage: 3 V