Hi-Fi Wireless Headset with FM Radio MW600 has a 3.5 mm plug built in so that you can swap the headphones to match how you listen to music in your phone. With A2DP you can stream high-quality stereo music from your phone to your wireless headset or other BluetoothTM devices. Clear sound, deep bass and better performance as standard. Built in microphone, call answer key and 3.5 mm jack to swap headphones. Multipoint: Connect to two wireless devices simultaneously, allowing access to the music files in your computer, PDA or other BluetoothTM-equipped devices. Best quality audio performance Microphone and call answer key Multipoint Bluetooth and A2DP for wireless music streaming Compatible with Sony Ericsson handsets and other bluetooth-enabled handsets 3.5mm jack to swap headphones Up to 8.5 hours stream time Up to 500 hours standby Up to 11 hours talk time