NOVELTY - The apparatus (10) has a Bluetooth module (11) configured to perform Bluetooth communication with multiple devices configured to perform Bluetooth communication. A processor (19) is configured to obtain received signal strength indications (RSSIs) of the devices. The processor is configured to search for devices, which are products manufactured by a same manufacturer as that of the apparatus and pair with one of the devices with a largest RSSI among the obtained RSSIs to establish the Bluetooth communication.    USE - Portable Bluetooth apparatus for use in a vehicle e.g. motor vehicles such as passenger automobile e.g. sports utility vehicle (SUV), bus, lorry and commercial vehicle, watercraft such as boat and ship, aircraft, hybrid vehicle, electric vehicle, combustion vehicle, plug-in hybrid electric vehicle, hydrogen-powered vehicle and fuel cell vehicle. Can also be used for use in an information communication device, a multimedia devices such as mobile terminal, mobile phone, wired and wireless phone, portable multimedia player (PMP), personal digital assistant (PDA), smart phone and MP3 player, a headset, a hands-free device, a portable terminal and a tablet personal computer (PC).    ADVANTAGE - The processor can add the devices that are the products manufactured by the same manufacturer as that of the apparatus to a list of devices manufactured by the same manufacturer upon confirming by the processor that devices are products manufactured by the same manufacture as that of the apparatus by using OUIs of MAC addresses and store the list of the devices manufactured by the same manufacturer on a storage device such as memory or hard drive. The apparatus can measure an RSSI of the head unit mounted in the vehicle to be the largest when RSSIs are measured by the Bluetooth apparatus positioned in the vehicle since the head unit integrated with the vehicle is a line-of-sight (LOS) and a head unit mounted in another vehicle is a non-line-of-sight (NLOS). The processor is configured to search for devices, which are products manufactured by a same manufacturer as that of the apparatus and pair with one of the devices with a largest RSSI among the obtained RSSIs to establish the Bluetooth communication so as to significantly decrease the number of searched devices, thus improving convenience of connection of the Bluetooth communication.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a Bluetooth communication method.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a portable Bluetooth apparatus.    Portable Bluetooth apparatus (10)    Bluetooth module (11)    Display (15)    Storage device (17)    Processor (19)