MAGNUM Two-In-One Portable Music Player (PMP) and Mobile Speaker Phone. The Bluetooth device both puts out audio over A2DP and interrupts music to let users take incoming phone calls. To answer a phone call, the power button then functions as an answer key for the speakerphone. The power button then functions as a end call key and the speaker will resume playing music.
The device has a battery life of up to 10 hours using four AA batteries as well as through AC power at a fixed location like a home. Cellphones themselves must use Bluetooth 2.0 or later. The MAGNUM can be purchased for $130.
