Create an unsigned transaction for offline signing

Network
Address to spend from
Unspent outputs
contains 0 mBTC (from 0 outputs)
Amount to send mBTC
Address to send to
Change address
Fee bits
Public keys (for multisig)
Threshold (for multisig)
Transaction
Sighash
Download the offline part of the app, together with the bitcore library and use it on an offline computer to create the signature for the transaction.
Signature
Binary transaction

Use TestNet for testing

TestNet faucet - TestNet explorer

Some TestNet keys you can use for testing:
private keyaddresspublic key

Log: