Silicon Labs offers a variety of classic Bluetooth modules to support applications. Class 2 device WT12 offers an integrated antenna, radio, and software stack. The WT21 offers an HCI option for use with a host processor. The Class 1 devices WT11i and WT41 offer long-range Bluetooth v2.1+EDR solutions with the support of the iWRAP Bluetooth stack from BlueGiga, which implements 13 different Bluetooth profiles and Apple iAP connectivity.