UTXO is an abbreviation of “Unspent Transaction Output”. Customize UTXO, that is, when you send transactions, you can choose which UTXOs you prefer, use a more economical UTXO combination, or assign a specific UTXO. Moreover, TokenPocket supports lower gas fee settings. With the combination of gas fee setting and custom UTXO, Users can stop worrying about "gas fee insufficient". Users can transfer even the last Satoshi bitcoin. Any Satoshi bitcoin will not waste in the daily transaction or the last transaction.