A hands-free kit for a mobile radio-telephone handset, the hands-free kit having an earpiece and an infra-red transmitter with the transmitter being able to relay audio signals from the handset to the earpiece. The earpiece includes an infra-red receiver for receiving audio signals from the transmitter. By positioning the transmitter in the line of sight of the earpiece receiver, audio signals may be relayed from the handset to the earpiece with the reduced likelihood of the earpiece becoming dislodged as the user moves his head.