Index55R Reception level ..................................................15Rechargeable nickel metal hydride (Ni-MH)battery (for the sub monitor station) .............4, 52Recording an image .........................................24Recording date and time ............................27, 29Recording number ......................................27, 29RegistrationLSub monitor station ......................................44LRepeater ......................................................45Repeater ...........................................4, 42, 45, 46Reset ................................................................49RESET switch...................................................10Ringer tone .......................................................34Ringer volume ..................................................33S SpeakerLDoor station ....................................................9LMain monitor station .....................................10LSub monitor station ......................................13Speaker volume................................................19Specifications ...................................................53Sub monitor station.......................................3, 12LCharging ......................................................16LRegistration ..................................................44LCancellation .................................................46System components .........................................42T TALK indicatorLMain monitor station .....................................10LSub monitor station ......................................12Transferring a call .............................................21Troubleshooting ...........................................47-50V Viewing recorded imagesLMain monitor station .....................................26LSub monitor station ......................................28Voice answer mode ..............................18, 37, 41Voice changer .......................................19, 37, 41VolumeLOUTGOING VOL .........................................19LSpeaker volume (INCOMING VOL) .............19LRinger volume ..............................................33W Water drain hole .................................................9Wireless monitor (Sub monitor station) ..........3, 4