The EM7455 DW5811E PN 8J6X0 is a 4G module that provides high-speed wireless connectivity for laptops. It supports LTE technology with a transmission rate of up to 300Mbps. The module is designed for use in Dell laptop models such as E7270, E7470, E7370, E5570, E5470, Precision 7720, Precision 7520, Precision 3520, and Precision 7510. It is compact, reliable, and offers global access to high-speed networks.