Model N16 Quantity 1 Color Black + silver Material Brass Internal Storage 4 GB Memory Card Type N/A Max Extended Capacity N/A Recording Time 3 Hour Record Audio Format MP3 Audio Formats MP3 Bitrates No Built-in Speaker No PC Interface USB Battery Built-in 110mAh Li-ion battery Other Features Support system: Windows 98 SE / 2000 / XP / 2003 / Vista; Press the button once begin to record voice press twice automatic store the record Packing List 1 x Recorder pen 1 x Earphones (95cm) 1 x USB cable (33cm) 2 x Black inks 1 x Chinese and English user manual 1 x English manual