# OPENDIME > The first Bitcoin bearer instrument. A small USB stick that lets you spend Bitcoin like a dollar bill. Load it, pass it along, and the next person can verify and sweep the funds. By Coinkite Inc. ## Product - [OPENDIME](https://opendime.com): Main product page - [Buy Now](https://store.coinkite.com/store/opendime): Purchase from Coinkite store - [FAQ](https://opendime.com/faq): Frequently asked questions ## How It Works 1. Plug into any USB port — generates a private key on the device 2. Send Bitcoin to the address shown 3. Pass the physical device to pay someone 4. Recipient can verify the balance at any time 5. To spend: push the pin through the marked spot to unseal the private key ## Versions - [Version History](https://opendime.com/versions): All hardware revisions - [Downloads](https://opendime.com/downloads): Verification tools and firmware ## Security - Private key generated on-device, never leaves until physically unsealed - Tamper-evident design — you can see if it's been opened - Open-source verification tools - [Verify an Opendime](https://opendime.com/verify/none): Online verification tool ## Company - [Coinkite Inc.](https://coinkite.com): Manufacturer (est. 2012, Toronto) - [COLDCARD](https://coldcard.com): Bitcoin hardware wallet (same company) - [Store](https://store.coinkite.com): All Coinkite products - [Terms of Use](https://coinkite.com/terms-of-use)