I can’t say for certain, but I think what the PTM-BAH2S Bluetooth headphone adapter by Princeton Japan is meant to do is to provide you with wireless freedom to your cell phone while still letting you use whatever 3.5mm headphones you’d like. It acts as a Bluetooth controller, easily hooking up with your mobile phone or compatible MP3 player, switching between tracks using the on-board controls.
Unfortunately, it’s not exactly a speed demon, because it only adheres to the Bluetooth 1.2 standard, rather than the more current 2.0 or 2.0+EDR. Thankfully, the Princeton unit supports a wide range of Bluetooth profiles, including HSP, HFP, A2DP, and AVRCP. The built-in microphone lets you take calls as well.
You’ll get 230 hours of standby and 6.5 hours of continuous playback from the integrated lithium-ion battery. Look for the 6800 Yen Princeton PTM-BAH2S Bluetooth headphone adapter to launch in Japan later this month.