IRiver H300 series
The iRiver H300 series are a series of portable audio players developed by iRiver, made up of the iRiver H320 and H340 models. They were first announced on September 22, 2004 replacing the H100/iHP-100. Each can play music, transfer pictures directly from digital cameras and UMS-compatible devices, such as flash drives (on the international version), and display digital images on a colour screen. In the United States, the H320 initially retailed for $329 and the H340 was $429. Features. The iRiver H300 devices support the playback of MP3, Ogg, WMA, ASF and WAV  encoded audio files, with an advertised 16 hours playback time. Alongside this, it features an FM radio with 20 pre-set memories. It can also record voice and FM radio via internal or external microphone, or line-in, to MP3 format. It supports the viewing of JPEG and BMP pictures, as well as TXT files. Since firmware 1.2, the devices can play movies at 10 or 15 frames per second with XviD (AVI) encoding. Hardware. There are two models: There are two hardware types for each model. These hardware types are commonly referred to by the locations they are sold . The USA models, predominantly sold in North America, have a built in DRM key, which lets them play music with Microsoft DRM. The International models, sold everywhere but North America, do not handle DRM-restricted content and have the HOST port linked to the battery, which allows them to do USB On-The-Go. The International models also support limited xvid (10 frame/s) video playback. North American models can be modified to support USB OTG by means of a small internal soldering job, an external modified cable, or a USB transfer box. International firmware is also required. Firmware. There  are 4 different firmware editions available for H300's Version history. There have been different versions of the firmware over time This firmware applies to the European, Korean and Japanese editions of the firmware. This firmware only applies to the America's edition of the firmware. Custom. The H300 series can run Rockbox, an alternative, open source firmware.