Yes, you can enjoy the benefits of your PRO VAG or ULTIMATE VAG plan with any OBDeleven device. The access to these features is associated with your OBDeleven account, not a specific device. So, all you have to do is to log in to the same account on the OBDeleven VAG app.
If you lose your OBDeleven device, you can buy a new one and continue using your existing account with the active PRO VAG or ULTIMATE VAG plan without needing to buy a new plan.
Note: The PRO VAG and ULTIMATE VAG plans can be used on the OBDeleven VAG app only, as they're designed exclusively for VAG (Volkswagen Group) vehicles.