"The bi-directional remote control supports many hearing instruments from Siemens. With ePocket, you can change the program and the volume of your hearing system and read out the system settings. For further information on ePocket, contact your hearing instrument specialist or refer to the ePocket user guide. ePocket is small for easy use and storage ePocket has easy to use visible, user friendly buttons for simple control ePocket read out function will display hearing program, volume setting and the battery status"