Yes, there are two ways to turn off the iHEARHD.
1) Push up the handle of the Battery Module to release. It is now in OFF position.
2) Inserting the iHEARHD device into the storage slot of the tool kit, by pushing it (1) IN, then (2) UP. It is now in OFF position and in storage mode.
Turning the device OFF when not in use is important to prolong battery life.
Please refer to the iHEARHD User Guide for more information.