Very cheap for the twin set, single units are selling for about £40 elsewhere, has good reviews and the Amazon rrp is £149.99 (hmmmm)
Digital audio baby monitor. 10 channels. Portable parent unit. Range 300m. Out of range indicator 50m. 5 volume and off. 2-way talk back. Night-light. Sound sensitive light display. 10 music melodies. Temperature display (degrees C/F selection). Black and white monitor display. Low battery audible beep. Requires 3 AA batteries - not included. Mains adaptors for parent and baby units. Power, menu, OK, Volume Up and Volume Down and Talk to Baby buttons. Complies with EN 60950.