Temperature Control Smart Mug Warmer and Wireless Charger - great office gift that maintains your beverages at a constant 55C temperature. The intelligent base is safe to touch even when heating the mug. This intelligent base recognizes metal foreign objects placed accidentally, and shuts power supply. Panel is waterproof & safe to touch even when switched on. The radio bottom cooling sheet dissipates heat at high temperature & accumulates heat when temperature is low. Wireless Coaster can be used as a normal Wireless Charger with regular mobile phones too! Mode of heating - wireless induction