So you are not ready to part ways with your wired headphones? PLUB can help. It is a compact Bluetooth receive that turns your wired headphones wireless. Its battery life lasts up to 5 hours. PLUB combines with a neckband to let you wear it around your neck anywhere.
The device weighs 10g. It works with any headphones that receive audio through a 3.5mm cable. More info is available here.