DECT. 120 channels. Portable parent unit. Range 50 metres indoor/300 metres outdoor. Out of range indicator. Volume control. Two way talk back. Night light. Sound sensitive light display. Music. 4 sing songs and 46 melodies. Temperature display. Black and white display monitor. Low battery indicator. Parent unit requires 2 x AAA batteries (included). Baby unit requires 4 x AA alkaline batteries (not included). Mains adaptor provided for both units. 1 parent unit. Recording feature. MP3 line in. Nature sounds. Manufacturer's 2 year guarantee.