Wireless Module/Other Module series & Other Module product Model Chipset interface Frequency Range Frequency Range H1 MT7601U USB1.1 USB2.0 2.412-2.4835GHZ WDM105B RIL8192EU USB 1.1 USB2.0 2.400〜2.4835Ghz WD8812B-DM01 WD8812B-DM01 USB2.0 2.4~2.4835GHz 5.150-5.250GHz 5.725~5.850GHz K81 RTL8811CU USB 2.0 2.4~2.4835GHz 5.150-5.250GHz 5.725~5.850GHz Connect to external antenna through the half hole K21 RTL8273BU USB2.0 2.4GHz~2.4835GHz K20 RTL8723BS 2.4GHz~2.4835GHz Connect to the external antenna through the half hole K8 RTL8188FTV USB 2.0 2.4~2.4835 GHz ISM Band K3 MT7601U USB1.1 USB2.0 2.4-2.4835GHZ K1 MT7601U USB1.1 USB2.0 2.412-2.4835GHZ QCA Reference design Model Chipset Memory Connector Band Band