D-Link DSL-3580L Series User Manual page 8

Section 1 - Product Overview
*Maximum wireless signal rate derived from IEEE standard 802.11ac specifications. Actual data throughput will vary. Network conditions and environmental factors, including volume of network
traffic, building materials and construction, and network overhead, lower actual data throughput rate. Environmental factors will adversely affect wireless signal range.
D-Link DSL-3580L Series User Manual 8