> For the complete documentation index, see [llms.txt](https://docs.unisat.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unisat.io/misc/articles/understanding-sub-1-sat-vb-bitcoin-transactions/sub-1-sat-vb-mode-setup-guide.md).
# Sub 1 sat/vB Mode Setup Guide
### 1. What is Sub 1 sat/vB Mode ?
This refers to selecting a fee rate lower than 1 sat/vB when inscribing or using UTXO management features. Most network nodes enforce a default relay policy requiring ≥1 sat/vB. But **Sub 1 sat/vB transactions is more common now that network fee is generally low.**
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✨ **Advantage of Sub 1 sat/vB Mode**:
Save transaction fees, suitable for non-urgent or large batch minting.
⚠️ **Risk of Sub 1 sat/vB Mode**:
Most pools ***do not*** mine sub **1 sat/vB transactions.** Confirmation is **not guaranteed** may take a long time (from several hours to several days) or never get processed.
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\&#xNAN;**‼️ Check Current Network Fee Rate**
Before setting sub 1 sat/vB fee rate, we recommend checking the current Bitcoin network congestion. A fee rate of 1 sat/vB or lower means it may result in longer confirmation times.
You may use [mempool.space](https://mempool.space/) to view the fee rate and estimated confirmation time in real time.
2. ### How to Set **Sub 1 sat/vB Fee** Order
Currently, UniSat Inscribe and UTXO Management Tool services have supported **sub 1 sat/vB mode**, allowing users to set fee rates below 1 sat/vB to reduce inscribing costs.
* In the fee selection area, set your custom fee rate manually or use the slider, e.g., `0.2 sat/vB`.
**Acknowledge Risk Warning**
* The system will display a risk alert when enabling sub 1 sat/vB fee mode. Please read the on-page warning carefully, and confirm that you fully understand the risks.
**Submit the Order or transaction**
* Click **Submit** to complete the process.
3. ### Difference Between Payment and Minting Transactions (Important)
Please note:
* **Under Sub 1 sat/vB Mode, you are only adjusting the fee rate for minting transaction, not for the payment transaction.**
* Please **do not** manually change the fee rate for payment to ensure quick order submission
**Disclaimer:**
The content of this document is for informational purposes only. It does not constitute (i) investment advice or recommendations, (ii) an offer, solicitation, or inducement to purchase, sell, or hold digital assets, or (iii) financial, accounting, legal, or tax advice. Digital assets (including FTs and NFTs) are subject to market volatility, involve high risk, regulatory changes, and may depreciate in value. The information is provided "as is," and we make no warranties regarding its accuracy. Please consult your legal, tax, or investment professionals to determine whether trading or holding digital assets is suitable for you.
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