The Angelcare monitor has been considerably updated and now offers the following improvements over the old version.1. Frequency. With two frequencies the data transmission will never interfere with the Sound & Movement transmission and it reduces the chance of interference with other appliances using 2.4GHz2. Functions. All main functions on the Nursery Unit can be chosen and managed from the Parent Unit.3. Batteries. The Parent Unit is now rechargeable, which adds convenience and peace of mind.4. Transmission. Parents can now choose to have sound activated or continuous transmission and also the sound level. 5. Channels. The number of available channels has increased from 3 to 8, which is sufficient to avoid interference with another baby monitor.6. Colour & Design. The new monitor comes in a nice aqua colour and has a full colour LCD screen and a night light that also works if the baby monitor is not on.This AC401 Version incorporates the sound monitor and the breathing monitor sensor pad.Parent Unit + Charger Features• 8 channels (manual selection)• Full colour LCD display• Baby’s room temperature indicator + programmable alarm• Sound indicator icon• Movement indicator icon• Tic indicator icon• Out of range indicator• Alarm sound and vibration options• Integrated belt clip• Adjustable sound volume• Rechargeable (batteries included)• Access to main functions on parent unit.Nursery Unit Features• Range up to 100m indoors and 250m outdoors• 8 channels (manual selection)• Sound activated or continuous sound transmission• 4 Functions:• Movement + Sound with tic• Movement + Sound without tic• Movement only• Sound only• Night light (illuminated halo)• Adjustable sound activated microphone sensitivity (4 levels)• Low battery indicator (warning light)• Alarm indicator (warning light)