Instant 802.11ac Wi-Fi upgrade for your desktop PC: no more messy Ethernet cables needed. Next-generation 802.11ac chipset for super-fast connections up to 867 Mbps Selectable dual-band 2.4 GHz/ 5 GHz operation, backwards-compatible with all existing devices Broadcom TurboQAM technology gives 33% faster 802.11n performance, with speeds up to 400 Mbps High-power design reduces wireless dead zones with 150% greater coverage Specially designed heatsink ensures stable and reliable continuous operation