The BT4 Bluetooth Pedal is compatible with iOS devices only, which means it's not possible to use the BT-4 Bluetooth pedal with BIAS Head/Rack. You can only connect BIAS Head/Rack with BIAS Amp2 iPad/iPhone app via Bluetooth.
We'd suggest you to use the BFS4 footswitch (it's wired!) with BIAS Head/Rack, check the information below:
BFS4 Footswitch
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