eSecuOTPCard by Excelsecu consists of highly secure One-Time Password devices. It supports OATH compliant TOTP algorithm for easy integration with OATH authentication systems. The programmable feature allows reseeding for an unlimited number of times using a special app, making it convenient for users to switch the network account that needs login protection. eSecuOTPCard can be used for authentication for Internet banking, access control, ID authentication, e-finance, e-commerce, etc. It combines OTP and card, fits in a wallet, and supports reseeding by mobile device or PC via NFC. It offers physical protection (Water/Tamper/Dust proof) and features an EPD screen for lower energy consumption. The battery lifetime ranges from 3 to 5 years, and it allows flexible customization. The product is widely used in various authentication security fields.