Model: i58 - Color: Black + Silver - Bluetooth headset with MP3 built in TF card support and Bluetooth wireless communication functions - Bluetooth version: Bluetooth V2.1 2.4GHz - Built-in MP3 player - Audio format support: MP3 - S/N ratio: 90dB - FM range: 87~108MHZ - Interfaces: 2.5mm audio + USB 5pin + TF slot - Support TF card up to 16GB - Built-in rechargeable 300mAh li-ion battery - Continuous talking time: about 12~15 hours - Music playing time: about 8~9 hours - Standby time: about 200 hours - Package included: - 1 * MP3 Bluetooth headphone - 1 * AC220V power adapter (EU plug) - 1 * USB Cable - 1 * 2.5mm to 3.5mm audio adapter cable - 1 * Soft carrying pouch - 1 * English/Chinese user manual