The Angelcare AC420 monitor makes you feel at ease with all of its safety features and rechargeable parent unit. The units comprise of the following: 8 channel options Digital colour LCD display on the parents unit Baby's room temperature digital display on the parents unit 4AAA rechargeable batteries included with the parents unit. The nursery unit uses 4AAA standard batteries (not included) Automatically reverts to batteries in case of power failure Choice of voice activated or continual transmission Out of range indicator Low battery indicator 2 x adaptors included Temporary mute option Practical soothing night light on the baby unit There is also a sensitivity switch located at the back of the baby unit which can be used as your child grows and moves off the pad more. (Please note - Parent unit must be charged for a full 15 hours before first time use)