SkyOne® WiFi Dual-Band 802.11ac Front-End Module: SKY85812-11 The SKY85812-11 is a highly integrated, dual-band front-end module (FEM) incorporating a 5 GHz single-pole, double-throw (SPDT) transmit/receive (T/R) switch, low-noise amplifier (LNA) with bypass, and 2.4 GHz single-pole, triple-throw (SP3T) with Bluetooth® port and LNA with bypass.