The OTP card fits you wallet and use E-INK EPD for lower power consumption and better eye protectionavailable in shallenge Response option with PIN protection
Can support NFC for Programing your own seed with simple smart phone
Dimension: Mini VC-N200L: 64 x 38 x 1.0mm , VC-N200L: 85.6 x 54 x 0.84mm
Power Supply: Flexible battery for 3-5 years
Button: Metal Dome
OTP Algorithm: SHA-1/SHA-256/SM3 Other
Working Temperature: 0 ~ +50
Standards: RoHS,ISO7810