The Ledger Nano S connects to any computer via USB and embeds a secure OLED display to double-check and confirm each transaction with a single tap on its side buttons.
This wallet was imported directly from Ledger in France and does not contain any anti-tampering stickers on the packaging. Make sure you agree to this prior to purchase, per the official FAQ:
Why isn’t it any anti-tampering sticker on the Nano S box?
Ledger is using cryptographic attestation to make sure that the devices you receive are genuine; A cryptographic procedure checks the integrity of the hardware wallet’s internal software each time it is powered on. The Secure Element chip prevents any interception or physical replacement attemps.
Anti-tampering stickers are security theater: any attacker capable of reproducing a device can print new shiny stickers. Ledger’s products are engineered to be natively tamper-proof and cannot be counterfeited.