Abstract: A temperature controlled computer input device includes a housing having at least one manual mechanism for generating data signals, a thermoelectric assembly, and a source of energy. The thermoelectric assembly includes two heat sinks and a Peltier effect device for creating warming and cooling configurations. The Peltier effect device includes two insulated materials spaced apart in a parallel configuration and semiconductors sandwiched between the insulated materials. The semiconductors are electrically connected in series by electrical conductors and electrically connected to the energy source. Ventilation holes and a fan are optional. Electricity flows in series through the semiconductors and electrical conductors, inducing a temperature differential between the two heat sinks. This heats the first and cools the second heat sink. Reversing the current direction cools the first and heats the second heat sink. The user selects the direction and amount of current flow to selectively warm or cool his hands.