Materials: ABS and metalSize: 410X292X29mmWeight: approximately 1kgFan size: approximately 140*140*15mm (1PCS)Fan size: approximately 80*80*15mm (4PCS)Fan speed: approximately 1100 rpm-2200 rpmVoltage: 5VDCProduct power: 4WNumber of USB ports: 2Compatible sizes: 12-17 inchesNotebook Cooler mute/ Notebook radiator base/ Notebook radiator bracketFeatures:The provides a comfortable and ergonomic work surface to keep you and your laptop cool.The pad has an ergonomic design that's thin and lightweight for easy portability.This laptop cooling pad is conveniently powered by the USB port on your computer/ with no power adapter needed. It offers an additional USB port for you to connect other devicesNote:After receiving the product/ there may be a little smell road/ on the outside for ventilation.Care Instructions:When not in use/ please store it.Thank you for purchasing my product. I hope to bring you good luck. If you have any questions, I will give you feedback as soon as possible.