The game pad connects to the S4 wirelessly using Bluetooth. It has a clamp to hold the actual phone on the top of the game pad. An arcade app pairs with the device and is powered with 2 AAA batteries. Samsung states that the accessory will fit a 4 in. to 6.3 in. screen size. This is very interesting because Samsung does not have a 6.3 in. device. Possibly, this is foreshadowing the Note III's screen size, possibly confirming the rumors of a 6.3 in. screen.
This is one cool accessory. This kinda makes up for the less-than-groundbreaking S4. There is no set price for this device yet but it is expected to be released alongside the S4. You can watch Engadget's hands-on review of the Game Pad below.