¢products status: stock Material: aluminum & plastic Type: double fans Application laptop size: 15.6inch and below Brand name: techcool/custmoised Model number: ncp78b Place of origin: guangdong, china (mainland) Color: black Usb port: 2 usb2.0 Weight: 760g Safety: ce, fcc, rohs Rated voltage: 5v Performance: excellent Delivery: 30days Air flow rate: 60 (cfm) Noise: 28dba Dimension: 270(l)x370(w)x33(h)mm Weight: 740g Fan dimension:140x140x20(mm) 2pcs Fan speed: 800 â± 150(rpm) Air flow rate: 55 (cfm) Uilt-in dual 14cm silent fans with big air flow.2 fans: 17 and bellow: 1----compatible 17 wide screen and bellows. 2---notebook cooler with perforated aluminum surface. 3---ergonomic design, with sturdy engineering structure. 4---ergostand offers 6 different height settings for laptop users, better viewing angle. 5---built-in dual silent 14cm fan. 6---compatible with 15.6 notebooks and below. 7---ultra slim size, allows you to easily carry it. 8---include 2 usb ports for connecting to various accesories. 9---unique anti-slip design ensures notebook safety.