The Minor II's innovative ear-fit system does not have any removable or replaceable components.
Minor II Bluetooth has an innovative ear-fit system with an adjustable loop for an optimised and ergonomic fit. Create a loop that fits your ear by sliding the cable in or out of the earbud until you find the perfect fit.
There is no app for the Minor II Bluetooth headphones.
Yes, Minor II Bluetooth can be used for phone calls.