Peace of mind at a glance. The innovative Groegg changes colour with the temperature of a room. A yellow glow means a safer temperature for children to sleep in. The Groegg also acts as a nightlight. The colours of the Groegg match the tog labelling on the Tommee Tippee Sleepwear range. This helps make choosing what baby should wear at bedtime for a comfortable night's sleep much easier for parents, helping everyone to get a better night's sleep. Our Tommee Tippee Groegg Digital Room Thermometer changes colour to indicate the temperature of the room so you can adapt your child's clothing or room environment accordingly Groegg is now USB rechargeable. No Batteries required, includes USB charger cable (excludes adaptor plug) so there's no need for batteries. Digital Room Thermometer with permanent lit LED readout - Provides a soft nightlight glow to keep your baby calm during the night Â• Use with Tommee Tippee Sleepwear range Box includes: Soft touch silicone dome. Cable and some electronic parts. WARNINGS: Do not place over or very close to a radiator, in direct sunlight or by an open window. Keep out of reach of children. Ensure that the power lead is not able to be reached or pulled by a toddler. Always remember to check your baby regularly to make sure he or she is not too hot or cold. If in any doubt, please consult your health professional.