# OPENDIME

> A sealed Bitcoin bearer stick. Load it, verify it, pass it hand to hand without an on-chain transaction, and irreversibly break the seal to sweep the bitcoin. 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. Recipient checks the address, balance, and sealed state
4. Pass the physical device without an on-chain transaction
5. To spend: push a pin through the marked spot to irreversibly unseal the private key
6. Sweep the full balance into a trusted wallet; the sweep is an on-chain transaction

## 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)