2 fans can be connected together with metal buckles to provide greater air volume, can be used as a laptop cooling fan Dual 12cm USB fans is very suitable for AV receiver/cabinet/game console/PC/laptop/TV box/DVR/router to dissipate heat. The double ball bearing has a service life of 65,000 hours, and the 7 blades produce strong airflow to keep the cabinet cool. There are three speed controllers with low gear (L), middle gear (M) and high gear (H). Fan spliced size 9.64” X 4.92” X 1.81”. Shockproof foot pads can make the fan lay flat or upright. This 120mm smart cooling fan offers hands-free temperature control (0-60℃) and 10 manual speeds. Whisper-quiet at 16dB, dual voltage (5V/12V), and built rugged for cabinets, pet areas, or grow rooms. Reliable cooling made simple.Plug & play.