Nintendo DSi main specifications are: 

• Dimensions:  5 25/64" x 2 61/64" x 3/4" (13.7 x 7.49 x 1.89 cm).
• Weight: 7.5 oz (214 g) 
• Charging time: Approx. 2 hours and 30 minutes
• Battery life: The lowest brightness (9-14 hrs), low brightness (8-12 hours), medium brightness (6-9 hours), high brightness (4-6 hours), highest brightness (3-4 hours)
• Additional Memory: SD card slot
• Top Screen: Backlit, 3.25-inch, transmissive TFT color LCD
• Bottom Screen: Same specs as top screen, but with a transparent analog touch screen
• Brightness Adjustment: Users adjustable
• Wireless Communication: IEEE 802.11 and Nintendo’s proprietary format
• Microphone
• Cameras: Two 3-megapixel cameras
• Input/Output: Ports for Nintendo DS game cards, terminals for stereo headphones and microphone.
• CPU: ARM9E CPU clocked at 133 MHz
• Sound: Stereo speakers
• Battery: Lithium ion battery
• More information: http://www.nintendodsi.com
• Suggested Retail Price for the US Market: USD 169.99