A device for transferring heat between a second module, for example an optical transceiver module, and a first module, for example a heat sink. The device comprises a holder for holding the second module, a first unit configured to be thermally coupled to the first module, and a second unit which is urged against the second module placed in the holder by a biasing apparatus. The first unit and the second unit are thermally coupled to one another through a heat-transferring apparatus such that an improved heat transfer can be provided between the first and second units, and hence between the second module and the first module. Furthermore, the disclosure also relates to an arrangement, including the device, and a network access node for a wireless communication system including any one of the device and the arrangement.