Everdure by Heston Blumenthal 4K Electric Ignition Charcoal Outdoor Oven (Stone) 4000 years in the making. The future of charcoal cooking, now! Striking both inside and out, the 4K is a solid machine constructed from diecast aluminum and thick gauge metal. Our unique insulation design reduces heat transfer to the external body sides and front. The 4Ks unparalleled airflow control system makes turning the heat up or slowing it down a unique experience. Both top and bottom vents are precisely numbered for a more balanced and responsive flow of air. With 2 discreet probes in the hood and 4 removable probes internally, the 4K takes outdoor cooking to another level. Displayed beautifully, all data can be accessed via bluetooth to our free app which is also packed full of hints, tips, recipes and alerts.