It is a mobile payment solution provided by KIS Information and Communication.Even at small merchants such as delivery and door-to-door sales through reader connectionYou can easily use the payment service anytime, anywhere.* main function- Credit card payment- Issuance of cash receipts- Receipt inquiry- Cancellation of payment- Points/membership usage and accumulation (OK cashback, carrier membership)- Payment receipt can be sent to customers (KakaoTalk, SMS, etc.)- Receipt issuance with dedicated Bluetooth printer- Transaction history inquiry- Sales status inquiryCurrently supported readers are BTR1000, BTR1100, BTR1200, BTR2000, CBP2000 and CBP2200.------ Permission Information -------locationRequired to search for nearby Bluetooth devices.SD card accessRequired for saving payment signatures, receipt images, etc.cameraRequired for reading QR codes and barcodes when paying for membership/points.