The Premium Care has a range of 1400m and a VOX function: voice-activated. Nightlight function on the babys transmitter. Very complete both units feature a walkie-talkie function, and an LCD screen indicating babys room temperature and low battery. Can operate with 2 transmitters to look after 2 babies (additional transmitters sold separately). The sound is clear and without any interference. The parents receiver comes with a charging base and a belt clip. Performance of digital technology. Monitor features: Digital signal. Out of range indicator. 1 parent unit included - portable. 2 way talk - allows you to reassure and comfort from another room. Vibrating alert. Night light - to sooth and comfort baby. Temperature display - for added peace of mind. Video features: Wall mountable camera. Power features: Low battery indicator. Parent unit includes mains adaptor - batteries required for parent unit 3 x rechargeable (not included). Baby unit includes mains adaptor - batteries required for baby unit 3 x AAA (not included). General information: Manufacturers lifetime guarantee.