1. Professional mini dv manufacturer 2. OEM factory in China 3. CE. RoHS 4. Attended 2011 Hongkong Electronics ... 1000-900K Byte) Flash memory Built-in 4GB, Can be inserted above16GB. Add-in-TF card Power supply 1. 1200MAH ... Play time up to 6 hours,Headphone playback songs in 60 hours or more MP3,WMA,WMV,ASF Headset maximum ... Supported operating systems Windows98/SE/ME/2K/XP,Mac OS 10,Linux 2.4.2