Hi my girlfriend have a Telecast 260 8)
Here some info:
* 2.4" inch 260k color TFT color LCD screen with 320*240 pixel resolution.
* DivX\XviD AVI videos supported (conversion software required).
* 80*47*9.8 size (mm).
* Micro SD memory expansion supported; maximum 1GB.
* Battery time: Up to 12 hours
* Multi-tasking.
* File Browser function.
* USB Disk function (WINME/Win2000/XP/2003/Vista)
* Supports firmware upgrades.
here can you find some firmware's
http://www.teclasters.com/showthread.php?t=222