Dimming & Pulse Proportional function controls terrarium temperatures very accurately from 64°F – 100°F/18°C up to 38°C Red LED will indicate when heating device is ON Recessed dial to prevent accidental temperature change Waterproof remote temperature probe Controls heating devices up to 300W and is ideal for use with Heat Mats, Heat Cables, Ceramic Heaters and Incandescent Heat Bulbs