The invention relates to an apparatus (10) for a security system of a vehicle (1), in particular for a keyless activation of a locking mechanism of the vehicle (1), having a communication device (20) for communication with a mobile identification transmitter (100) by means of a radio signal (F) with a radio frequency (F.1), wherein an inductive charging process (L) can be carried out in the region of the vehicle (1) with a charging frequency (L.1), in particular for electrically charging an energy storage device.According to the invention the radio frequency (F.1) differs from the charging frequency (L.1) such that an interference in the communication with the mobile identification transmitter (100) can be prevented.