A wireless control device (2; 40), comprising: - a housing , - a movable actuating element operable from outside the housing, - an electronic control circuit (18; 48) comprising a wireless transmitter capable of transmitting a control signal to an electrical appliance, - an energy recovery device (12; 42, 44) configured to supply electrical power to the electronic control circuit, the energy recovery device being mechanically coupled to the movable actuating element by means of a transmission mechanism and configured to convert mechanical energy into electrical energy when the movable actuating element is actuated, by supplying an electrical output voltage between output terminals (V+, V-), wherein the direction of movement of the transmission mechanism determines the sign of the output voltage (V+, V-) delivered by the energy recovery device, wherein the control circuit further comprises a power supply device (14, 16; 46) and a pulse detection circuit (20; 50, 52, 54, 56), the power supply device and the pulse detection circuit being connected in parallel between the output terminals of the energy recovery device and an input of the transmitter, in which the power supply device (14, 16; 46) is configured to accumulate the electrical energy supplied by the energy recovery device and, with the accumulated electrical energy, to supply the transmitter temporarily with electrical power so that the transmitter can send the control signal, wherein the pulse detection circuit is configured to identify the sign of the output electric voltage and to store information representative of the sign of the output electric voltage, the transmitter being further configured to include, in the control signal sent, the information representative of the sign of the output electric voltage, and wherein the pulse detection circuit (20; 50, 52, 54, 56) comprises a memory, configured to store a signal representative of the sign of the voltage delivered by the energy recovery device. - a housing , - a movable actuating element operable from outside the housing, - an electronic control circuit (18; 48) comprising a wireless transmitter capable of transmitting a control signal to an electrical appliance, - an energy recovery device (12; 42, 44) configured to supply electrical power to the electronic control circuit, the energy recovery device being mechanically coupled to the movable actuating element by means of a transmission mechanism and configured to convert mechanical energy into electrical energy when the movable actuating element is actuated, by supplying an electrical output voltage between output terminals (V+, V-), wherein the direction of movement of the transmission mechanism determines the sign of the output voltage (V+, V-) delivered by the energy recovery device, wherein the control circuit further comprises a power supply device (14, 16; 46) and a pulse detection circuit (20; 50, 52, 54, 56), the power supply device and the pulse detection circuit being connected in parallel between the output terminals of the energy recovery device and an input of the transmitter, in which the power supply device (14, 16; 46) is configured to accumulate the electrical energy supplied by the energy recovery device and, with the accumulated electrical energy, to supply the transmitter temporarily with electrical power so that the transmitter can send the control signal, wherein the pulse detection circuit is configured to identify the sign of the output electric voltage and to store information representative of the sign of the output electric voltage, the transmitter being further configured to include, in the control signal sent, the information representative of the sign of the output electric voltage, and wherein the pulse detection circuit (20; 50, 52, 54, 56) comprises a memory, configured to store a signal representative of the sign of the voltage delivered by the energy recovery device. <EOS>