Melomania Touch cannot connect to more than one device at the same time, however, the earphones can remember multiple devices.
If you follow the steps below, you can connect a previously paired device to the earphones.
Return the earphones to their case.
Disable Bluetooth on your initial device.
Switch on Bluetooth on another device.
Remove the earphones from the case and they should pair automatically.
If they don't, enter the Bluetooth settings of your new device and connect to "Melomania Touch L/R" manually. (Make sure they are in pairing mode.)