... / support of a balanced, high-power dual speakers, Bluetooth stereo output, and enjoy ultra-sound effect. Video player: ... USB data cable / U disc features / Bluetooth file transfer Bluetooth Headset (voice) / Bluetooth music (stereo) Pic Format: jpg,gif Address Book: ... function, WAP functions, handwriting input, radio features, Bluetooth, GPRS download, MMS, memory expansion, calls firewall,dual ...