Use both PW and AiR and as much as live them, have too many AiR units. For sale is one Profoto Air Transceiver. Works like a charm. Comes with unit & lanyard. No cable, box, etc.
Profoto Air Sync Transceiver for Packs and Heads 901032 B&H
Price is CDN $150 by EMT shipped by NORMAL POST in Canada or US. If PayPal, add 3%.
References here or on FM as Conner999.