Bluetooth headphones are cool but the only disadvantage the Bluetooth connectivity and seperate batteries make them heavy. This is not the case with the Panasonic EB-M70083 which are one of the smallest we have seen, it supports Bluetooth ver 1.2 along with A2DP/AVRCP/HFP/SPP profiles. You can use it with a compatible cell phone as they can also be used for making / receiving phone calls. The built in battery is good enough for 4.5 hours of wirefree music and 6 hours of telephone conversations.
The Panasonic EB-M70083 just weigh 25 grams and will be available in Japan from December 11 for 6,825 Yen ($ 60)