R9NBC-CMC3-GP, Plastic, rubber, 200x200x20 mm fan, Fan Speed 700 R.P.M. 15, Single fan speed, Fan Airflow 74.5 CFM, Fan Noise Level 21dBA, Supports up to 15" laptops

Fan Dimension: 160 x 160 x 15mm, Plastic, Metal Mesh, Rubber, Weight 720g, Support all 17" and smaller laptops, Single speed, Airflow 70 CFM, Fan Noise Level 21 dBA

MNW-SWTS-14FN-R1, Dimension379 x 285 x 47.5 mm, Fan Speed 1400 15 RPM, Fan Noise 29 dBA (Max), Ports USB 2.0 x 1, Micro USB x 1

COLOR: Black; MATERIAL: Aluminum, Metalmesh, Plastic, Rubber, Cloth; DIMENSIONS (L X W X H): 343 x 266 x 53 mm; FAN DIMENSIONS (L X W X H): 80 x 80 x 10 mm; FAN SPEED: 2000 RPM; FAN AIRFLOW: 31 CFM; FAN NOISE LEVEL: 21 dBA; POWER: USB 5V DC; USB: USB 2.0/1.1 x 1 (For Power Input); CURRENT CONSUMPTION: 0.36A; POWER CONSUMPTION: 1.8W; COMPATIBILITY: Supports up to 17" laptops; WEIGHT: 0.57kg.

R9-NBC-U3PK-GP, 3x 80mm movable fans, up to 19" notebooks, USB

Illumination colour Blue, USB powered, Noise level 11 dB, Rotational speed 1200 RPM, Fan diameter 12 cm, Number of built-in cooling fans 1 pc(s) ,Maximum screen size 39.6 cm (15.6"), USB version 1.1, USB ports quantity 2, Dimensions (WxDxH) 365 x 290 x 54 mm

Cooling fans: 1 PC, 1000 RPM (± 10 %), airflow 23 CFM (± 10 %), Fan diameter: 120 mm, USB cable length: 0.4 m, USB connector: passthrough type (in/out), Dimensions (LxWxH): 330 x 250 x 25/50 mm, Power consumption: 5 V DC, up to 0.4 A