Logitec Japan (not to be confused with Logitech) has released what it claims to be the world’s smallest stereo Bluetooth 2.1+EDR earphones. The LBT-PCHP02 series are designed for PC users, while the LBT-AVHP02 series are designed for portable audio players. Both earphones sport batteries that allow for four hours of playback and measure in at 1.3-inches long and 0.23 inches thick. Several earbud sizes are included to ensure that it fits all wearers and these earphones are capable of supporting two different Bluetooth sources simultaneously, so you’ll be able to connect it to your media player and phone at the same time. They have been tested on iOS 4.1 and will support Apple’s implementation of AVRCP along with A2DP. These earphones will be released in Japan mid-October and will set you back $54.