Ending today, All4Cellular offers the Asus VivoTab RT Mobile Docking Keyboard
in Gray, model no. TF600T-DOCK-GR, for $69.95. Coupon code "A4C5OFF" cuts it to $66.45
. With free shipping
, that's the lowest total price we could find by $23. This keyboard transforms the VivoTab RT tablet into a laptop and purportedly increases its battery life by 16 hours. It features a USB port and SD card slot.