There is provided an energy delivery device comprising a storage device, a discharge circuit and a disarm circuit. A current sense amplifier is provided to amplify the output voltage of a current sensor of a voltage regulator. The treatment tip includes an electrode configured to deliver the high frequency energy to a region of the tissue, a channel for circulating heat transfer fluid proximate to the electrode, and an inlet passage to the channel. The case member further includes recesses in fluid communication with the one or more channels and configured to receive and retain the headphone earphones within.