The iRiver H100 series (originally iHP-100 series) is a series of discontinued portable digital audio players (DAP) made by iriver  and originally released in October 2003. The models in the H100 series differ mainly in hard drive storage capacity. The players were succeeded by the iriver H300 series.

Features
The iHP-100/H100 players natively play MP3, Ogg Vorbis, WAV and WMA (non-DRM) format files. It also has a built-in stereo FM radio tuner.

Analog and digital optical line in and out. The player records from line in (analogue or optical), built-in or external microphone to WAV or MP3 format (supports powered or unpowered external microphones).

There is also a wired remote with 128×64 pixel black and white LCD, which can control any function of the DAP (same as iMP-550).

Its USB 2.0 interface supports USB Mass Storage (drag and drop music transfers).

Upgrades

Firmware
It is possible to upgrade the firmware on H100 series players. These upgrades generally contain bug fixes and new features. The latest official version of the H100 series firmware was v1.66.

Hard drive
The H100 series is equipped with a 1.8 inch (45 mm) form factor hard drive manufactured by Toshiba. Storage density has increased since their introduction, making it possible for users to replace the factory drives with higher capacity aftermarket models. Opening the case of the player voids the warranty. However, after the case has been opened the upgrade consists of simply unplugging the old drive and inserting the new one.

As of December 2005, the H120 can be upgraded with a 30GB single-platter drive (giving a 50% storage increase) and the H140 can be upgraded with an 60GB double-platter drive (giving a 50% storage increase). Due to differing physical sizes, the two drive types cannot be used interchangeably (i.e. a double-platter drive will not fit in an H120 casing).

As of 2008 The H140 can be upgraded using a ZIF to ATA conversion cable to take a larger capacity 1.8 inch non ata hard disk drive. The 240GB MK2431GAH ZIF drive has been used in the H140 and the 160GB MK1634GAL ZIF drive has been used in the H120.

As of 2012, the H120 can be upgraded to a 120GB SSD drive using a 50Pin Series 1.8" CF ATA SSD.

As of 2018, the H120 can be upgraded to a 128gb Micro SD drive using a 1.8" IDE to SD adaptor.

Battery
The battery used in the H100 series is physically similar to the battery used in iPods and other DAPs. It is possible to replace the factory battery with a higher capacity one (up to 2200 mA·h has been reported) for greatly increased playback time. In some instances the polarity of the battery leads must be reversed, and the installation process will void the warranty.

RTC (Real-time clock)
Users have succeeded in adding an RTC chip to the player's main circuit board, allowing the device to display the current date and time as well as adding alarm clock functionality, accurate filesystem timestamping and last.fm logging. Note that Rockbox is the only firmware known to be able to utilize an RTC-modified H1xx.

Models
H110 (originally iHP-100, later iHP-110): 10 GB hard drive
H115 (originally iHP-115): 15 GB hard drive
H120 (originally iHP-120): 20 GB hard drive
H140 (originally iHP-140): 40 GB hard drive

Dimensions and weight
H110, H115, H120: 105×60×19 mm, 160 g (including battery)
H140: 105×60×22 mm, 172 g (including battery)

Reception

See also 
 Rockbox (alternative, open source firmware for the iriver H10, H100 and H300 series)

References

External links
www.iriver.com — the manufacturer's web
New Product 10G HDD based MP3 player, iHP-100 — the product announcement from the manufacturer's web
iRiver iHP-100 Series — the first version of the product page from the manufacturer's web

Classic style jukebox H100 series — product information on the manufacturer's web

Digital audio players
IRiver
Consumer electronics
Products introduced in 2003