Nokia 6600 Fold main features:

Model created in April 2008
GSM 850/900/1800/1900, UMTS 850/2100
Platform Series 40 SPRY.2
Main 2,13 inches display performed with the help of the OLED technology with the resolution 240x320 pixels (32,4x43,2mm) and able to reflect up to 16 million colors.
Additional 1,36 monochromes display created with the help of the OLED technology with the resolution 128x160 pixels (21,5x26,9mm).
Battery BL-4U Li-Ion 860
Talk time is up to 4 hours
Stand by time is up to 300 hours
Weight 110 grams
Dimensions: 87,7x44x15,9mm
Memory: 15 Mega bites built in memory; MicroSD memory card slot (up to 4 Gb)
Camera: built in 2,0 mega pixel camera with 8X zoom, video recording with the resolution QVGA 30 fps, VGA 15 fps in the H.264 format, VGA camera for video phony.