The Babymoov High Care Baby Monitor has a range of 1000m & an impressive 136 channels. Built in is a digital screen that features a temperature indicator along with a temperature alarm. The unit is voice activated & the microphone sensitivity can be adjusted to suit. This baby monitor features 4 different alarms, these are sound, visual, vibration & distance. The reciever runs on a longlife rechargable lithium battery, while the transmitter has the option to run on the mains or on AAA batteries. Technical Features Emission Power: 5-10 m W Frequency: 865 MHz Powered by rechargable Lithium Batteries (parent's unit) & 3 AAA batteries (Baby's unit) or mains operated (adapters included).