If this is the case, there should be a prepaid trial card. You can get a prepaid card at the front desk and refund the balance after use. But most of them should be membership cards, which can be used as recharge cards. Fees are prepaid in advance and automatically deducted from the balance after each use.

His principle is an intelligent machine that places a switch at the faucet position.

1, time charge. After swiping the card, the faucet valve will automatically open and record the time. When not in use, swipe your card to stop discharging water and charge according to the length of time.

2, limited time, automatically start drainage after swiping the card, and automatically close after the time is up.