What's the price of the door lock of Adil Hotel?

50 yuan, the door lock of Adele Hotel, is a control card, which is used to correct the time of the door lock. After the door lock is first installed or the circuit board is disconnected during maintenance, it is necessary to use a clock card to correct the time. Just like a Nokia phone, if you turn it off, unplug the battery and turn it on again, you need to recheck the time. The price comes from the internet, for reference only!