You’re able to order as many Card Readers as you’d like for your Booksy account. However, you can only connect one Card Reader at a time to each individual mobile phone/tablet/computer. For example, if you use a mobile phone and a tablet, you’ll be able to connect one Card Reader to each.
How many card readers your business needs ultimately varies depending on your business. If you are using multiple checkout stations in a store, or are frequently traveling between store locations, you may find it useful to have a card reader at each station/store.