Roland PBS-6U adapter
This adapter is great, as I don't have to worry about batteries anymore. But, like others that have reviewed this, I think it should be included with the R-05 recorder ( which BTW, I think is a fantastic machine.) I record my band live almost every gig, and it is a great tool to have for listening to yourself after the fact! It makes the best recordings ever, and no need for anymore mini-disks, as it's storage media is a SDHC card. I loved this recorder and highly recommend it to anyone who would like to record live performances.