XSONIC AIRSTEP Manual page 14

AIRSTEP Lite is mainly used for wireless control. It can work in 2 modes, standalone mode and wireless
external footswitch mode.
In standalone mode, Lite Bluetooth connects to mobile phones, tablets, and computers to send MIDI
messages and HID messages. At this time, the connection and usage of Lite are the same as AIRSTEP, so
please refer to AIRSTEP for these points.
In the wireless external footswitch mode, Lite connects to AIRSTEP as its wireless external footswitches.
At this time, all control messages are sent from AIRSTEP, and Lite is only used as a wireless extension.