Vaas Stereo Bluetooth Receiver with Built-In Microphone, 3.5mm Audio Jack and Ultra-Compact Form Factor - Make Any Audio Device Bluetooth Capable Wirelessly connect to Bluetooth enabled smartphones, headsets, tablets, computers and more Can be used with any pair of headphones or audio device with a standard 3.5mm connector Make or receive calls, listen to music, and more through your car, speakers, or any other device with built-in mic and audio controls Up to 30ft range, with up to 60 hours of standby time and 4 hours of music playback/talk time Charges via USB, and supports bluetooth headset, handsfree, and A2DP profiles