Zero interference. Eco mode. 2 way communication on mode signal. Voice activation. 5 childrens melodies. Temperature sensor. Night light, with three little stars. High sensitivity microphone in the baby unit. Stay connected with talk back. Adjustable audio sensitiveness. Sound level LED light. Volume control. Connectivity alert. Out of battery alert and power indicator. On mode function. Voltage 220-240v. Rechargeable. 300m range. Standard equipment ac/dc adapter: 2x9v cc 300ma. Powered by 2 rechargeable AAA nimh batteries. Parent unit charger. Beltclip.