«Bitcoin fans argue that it qualifies as
a currency under these criteria: most importantly, it's something that parties can agree to accept as legal tender and a store of value.
CoolWallet S is configured with a SE (Secure Element: Common
Criteria EAL5 + certified) chip to store Crypto
currencies private keys, a communication module including BLE (Bluetooth Low Energy 4.0), NFC (Near Field Communication), an e-paper display (bistable, ultra-low power consumption, good contrast ratio 7:1, wide view angle (almost 180 degrees and readable
under sunshine), durable / pressure resistant), a rechargeable battery and an OTP (One Time Password) generator.