Size and Dimensions- The phone weighs 4.9 ounces(140 grams) and is 4.5 inches(115.2 mm) high, 2.31 inches(58.6 mm) wide and 0.37 inches(9.3mm) deep.

Display- It has a 3.5 inch (diagonal) widescreen Multi-Touch Retina Display with 960 x 640 pixel resolution at 326 ppi. The phone has a 800:1 contrast ratio and 500 cd/m2 maximum brightness with support for display of multi languages and characters simultaneously. iPhone 4S also has a finger print resistant oleophobic coating on front and back.

Camera- The phone has a 8 mega-pixel auto focus camera with LED flash, Tap to Focus and Face Detection in still images. The phone has a capacity to record HD videos(1080p) at 30 fps and also has video stabilization. iPhone 4S has a front camera which captures still pictures with VGA quality and records videos at 30fps.

Memory- The phone is available in 3 models with memory of 16GB, 32GB and 64GB. Battery Backup- iPhone 4S has a built in Li-ion battery rechargeable via USB to Computer system or power adapter. The battery offers talk-time of up-to 8 hours on 3G and 14 hours on 2G(GSM), standby time up-to 200 hours, audio playback up-to 40 hours, video playback up-to 10 hours and internet use up-to 6 hours on 3G and 9 hours on Wi-Fi.

Sound Playback- The phone supports a variety of audio formats such as AAC (8 to 320kbps), MP3 (8 to 320kbps), MP3 VBR, Protected AAC (from iTunes Store), HE-AAC, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX and AAX+).

Variety of Colors- iPhone 4S is available in two colors i.e. white and black.

Network- The phone UMTS/HSDPA/HSUPA(850, 900, 1900, 2100MHz) ; GSM/EDGE (850, 900, 1800, 1900 MHz) , CDMA EV-DO Rev. A(800, 1900 MHz) 4.

Connectivity and Location Features- The phone uses Bluetooth 4.0 wireless technology and 802.11 b/g/n Wi-Fi (802.11n 2.4 GHz only). The phone also has features like Assisted GPS and Digital Compass which would guide you to the right way.

External Connectors and Buttons- The phone looks very similar to iPhone 4 with the same home button in the centre, volume rockers on the left side surface, on/off button on the top right and 3.5mm headphone jack at the top left.

Sensors- The sensors include Three-axis gyro, accelerometer, proximity sensor and ambient light sensor.

Headphones- iPhone 4S has great quality Apple Earphones with Remote and Mic with frequency response ranging from 20Hz to 20,000Hz and Impedance of 32 ohms.

TV and Audio- The phone has a capacity of AirPlay Mirroring to Apple TV support at 720p. Video Mirroring and video out support is also possible up to 1080p with Apple Digital AV Adapter or Apple VGA Adapter which are sold separately. iPhone 4S also features Video Out Support at 576p and 480p with Apple Component AV Cable, 576i and 480i with Apple Composite AV Cable. iPhone 4S supports a large variety of video formats like H.264 video up to 1080p, 30 frames per second, stereo audio in .m4v, .mp4, and .mov file formats;
MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, High Profile level 4.1 with AAC-LC audio up to 160 Kbps, 48kHz, Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats.

Mail Attachment Support- The viewable document types include .gif, .tiff, .jpg (images), .doc and .docx (Microsoft Word), .htm and .html (web pages), .pages (Pages), .numbers (Numbers), .key (keynote), .pdf (Preview and Acrobat Reader), .ppt and .pptx (Microsoft Powerpoint), .vcf (Contact Information), .xls and .xlsx (Microsoft Excel), .txt (text) and ..rtf (rich text format).

System Requirements- The Mac System Requirements include Internet Access, Mac Computer with USB 2.0 port, Apple ID, iTunes 10.5 or later and OS X v10.5.8 or later. The PC system requirements include Internet Access, PC with USB 2.0 support, Windows 7; Windows Vista; Windows XP; with Service Pack 3 or later, Apple ID and iTunes 10.5 or later

Box Contents- Apple iPhone 4S -Apple Earphones with Remote and Mic -USB Power Adapter -Dock Connector to USB Cable -Documentation