The invention relates to a signal-repeater device (308) being operable in a regular repeater-operation mode and in a low-power repeater-operation mode requiring less operational power than the regular repeater-operation mode, and that comprises a signal processing unit (316) which performs, in the regular repeater-operation mode, a signal receiving function and a signal repeating function, and an operation control unit (318) configured to determine status information indicative of associated external transceiver devices being respectively operated in a low-power transceiver-operation mode, operate the signal processing unit in the low-power repeater-operation mode by switching off the signal repeating function upon determining, based on the determined status information, that each of the associated external wireless transceiver devices is being operated in the low-power transceiver-operation, thus reducing the power consumption of the signal-repeater device, and switch to operation of the signal processing unit in the regular repeater-operation mode upon reception of a predetermined repeater-wake-up signal.