Dear Bozidar, Sorry for bringing less satisfying experience. We checked the situation. You ordered several units of EVC10 3-phase socket version for commercial use in 2022 by one of sales who has left. Another sale solved your problem and suggested two ways to add the addtional RFID cards. Next time, we would pay more attention to the change of sales. Also, pls feel free to contact us by Alibaba in time if you find there is a problem unsolved. Thank you. Have a nice day!