An eCheck is very similar to a wire transfer in that it comes directly from your financial institution. However, eChecks are for depositing only, withdrawals cannot be made via eChecks. An eCheck is just like writing a regular check except that this method is done online or via phone.
In order to use the eCheck deposit method you will need only the information found on one of your bank checks. Fees with eCheck deposits are typically less than those for wires transfers. Some online poker rooms will cover the fees for your eCheck.