Ainol Novo7 Mars Features:

OS: Android 4.0 
CPU: Amlogic8726-M3 Cortex-A9(1Ghz) 
RAM DDR3 1G Ram 
Storage 8GB/16GB 
Screen: 7 inch Capacitive Touchscreen, 1024*600 High-resolution Screen 
Resolution: 1024*600 Pixels 
Shell Material: Plastic 
Visible Angle: 150° 
Display: LCD 
G-sensor: 3 axis G-sensor 
Android Market: Yes

Ainol Novo7 Elf II Features:

CPU: Amlogic8726-M6 cortex-A9 1.5GHz

Display: 7.0 inch Capacitive Multi-touch Screen, 1024*600 pixels.

OS: Android 4.0.3 Ice Cream Sandwich operating system
Memory: 2-16GB , Max can support 32GB
Camera: 2MP Front Camera supporting video calls, taking photos and recording video
Wifi: Yes, support
Audio: Support MP3/WMA/AAC/APE/FLAC etc. audio formats playback
Video: Support RM/RMVB/AVI/MKV/MOV/DAT/FLV/3D etc. foramts 2160P Full HD video playback
Picture: Support JPG/BMP/PNG/GIF etc. formats picture browser
Recording: Built in Mic.,has long recording time
E-book: Yes, support bookmark, auto-browsing etc. functions
G-sensor: Yes, support
                                                                    Other features: HDMI, OTG, USB3.2 etc.
                                                                                                Battery: Built in 4000mAh lion battery
                                                                                                              Battery life: long battery life, has 25 days stand by time, 8 hours game time

Ainol Novo 7 Tornado Features:

OS: Android 4.0
CPU: AMLogic AML8726-M3 1GHz, Cortex A9
GPU: Mali 400
Storage 8GB
Shell Material Plastic
Screen: LCD Capacitive Touchscreen, 800*480 Res
Size: 7 inch
Shell Material: Plastic
Resolution: 800*480 Res.
Display: LCD

Processor: Allwinner A10 (Cortex-A8) @ 1GHz
GPU: Mali 400
 Operating System: Android 4.0 Ice Cream Sandwich
 Display: 7.0 inch IPS / 16:9 ratio / 800x480 pixels
 Input: Capacitive Multi-Touch Screen
 Internal Memory: 8GB
 Expandable Memory: Supports up to 32GB Micro SD
 Audio Input: Microphone 
 Audio Output: 3.5 mm Jack and Integrated Speakers 
 Wifi Connectivity: 802.11 Wireless b/g/n
 Peripheral Support: USB HOST (mouse, keyboard, memory stick, etc) 
Camera: Front 2.0MP
                                         HDMI: Mini HDMI for full 1080p HD Video Playback & TV Out
                                                                                               Gravity Sensor: Integrated Gravity Sensor for Gaming and Screen Rotat ion
                                                                                                              Battery: 3.7v / 3700mAh (Approx 5-7hrs)

Novo 7 Aurora Features:

Model: Ainol Novo7 Aurora
Processor: Allwinner Many COR A10, 1.5GHz
Operation System: Android Ice Cream Sandwich OS (Android 4.0 OS)
Nand Flash: 8GB or 16GB
Shell Material: Plastic
Screen Size: 7 inch 
Screen Type: Capacitive 5-point multi-touch screen
Display Resolution: 1024x600 pixels, IPS screen
Visible: Angle 180°
Extend Card: Support TF card up to 16GB
Gravity Sensor: Yes
Multi-Touch: Yes, 5-points touch
                                                                                Flash: Support Flash 10.3
                                                                                      Android Market: Yes
                                                                                     Bluetooth: It has and app called "bluetooth share" BT not confirmed to work on it though.
                                                                                                  WiFi: 802.11 b/g/n
                                                                                            3G: Not built in, support 3G/WCDMA dongle
                                                                                          Earphone Interface: 3.5mm
                                                                                         Battery: 3700MAh, 300 hours standby, 6 hours video playing