We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.
Running off of a proprietary operating system, the Karbonn K451+ is a feature phone with dual SIM functionality modeling a TFT LCD display with 240 x 320 pixel native resolution, a physical keypad and an 1800 mAh battery. Additional features include 64MB internal storage, a microSD media slot (for up to 8GB storage expansion), a 1.3-megapixel rear-facing camera, as well as USB and Bluetooth connectivity options.
Dual SIM Functionality
TFT LCD Display
240 x 320 Pixel Native Resolution
microSD Media Slot