New Electronic payment and loyalty system in ICW self-service car washes – the key of IMpuls. The key is made in the form of a keychain, you can hang it on the keys and always carry it with you. In our opinion, this is much more convenient than the card of which we simply have nowhere to put in our wallet. We write the balance to the Key after receiving money from the client to replenish the key. The customer inserts the key into the slot of the token receiver, the balance of his key is displayed on the board and he can perform washing operations.