Features: 1) The range of the optional temperature: the temperature can be selected between the ambient temperature and 90°C with automatic-homoiothermal control 2) Precise temperature control: ±3°C 3) Digital display: the surveying temperature and the set temperature are designed in digital display, and the value storage is installed to automatically keep the set temperature after operating 4) Heating system: new type materials are adopted for fast heating, durability and energy saving 5) Corrosion-resistant: it is made of special black materials with corrosion resistance and durability.