You can transfer money back to your bank by tapping on your Wallet and selecting Send and then Transfer money to a bank.
Transfers out of HyperJar during working hours usually take 4 hours to reach your bank account. However, if you transfer in the evening, the money will reach your account the next morning. If you transfer during the weekend, the money will reach your account the next working day.
Transfers out are only possible when the card is activated.