TCX21, portable thermoelectric cooler, 21 l, 12/24/230V. The Dometic TropiCool TCX 21 is an energy-efficient thermoelectric cooler featuring specialized electronics and an intelligent energy-saving circuit. Like all models in the popular Dometic TropiCool series, it impresses with mobility, comfort, and reliability. A robust fan provides demand-dependent internal ventilation and allows cooling down to 27 °C below ambient temperature as well as heating up to +65 °C. In addition to a new attractive design, the TCX offers new safety features for electrical connections. It is a compact and lightweight cooler that you can take anywhere.