These models are identical, except the TJ-35 also offers MP3 and ATRAC playback capabilities with a headphone jack.
Powered by an ARM iMX-1 processor at 200 MHz, these devices ran the Palm OS 5 platform, featuring 32 MB of internal storage (23M available for user data), as well as a Memory Stick PRO slot for additional storage expansion.
[1] The case of these devices appears to be aluminium, but is actually a painted plastic enclosure, with an internal steel plate providing structural rigidity.
The Sony CLIÉ PEG-TJ37 and PEG-TJ27 were released in early 2004, and improved upon the previous models with the addition of an integrated digital camera, complete with dedicated shutter button, and a manual sliding lens cover.
Like the previous models, the higher-end TJ37 also included MP3 playback capabilities, but now also added Wi-Fi for mobile internet access.