DECT signal - interference free and guaranteed privacy. 120 channels. Portable parent unit can be paged if misplaced. Range 350m. Out of range indicator. Volume control. Two way talk back. LCD display. Customisable multi-coloured night light can be operated from both parent and baby unit. Sound sensitive light display. Sound activation mode. Vibration alert. Feeding timer. Temperature display. Low battery indicator. Removable belt clip. Portable parent unit requires 2 x AAA Ni-MH rechargeable batteries (included). Baby unit requires 4 x AA batteries (not supplied) for portable use. Mains adaptors are provided for both baby and parent unit. 1 parent unit included. Extra parent units can be purchased separately. Manufacturer's 2 year guarantee.