Wave Gun

Overview
The Wave Gun is one of the two Wonder Weapons that is set to appear in the upcoming zombie level, Moon. According to Treyarch, the weapon will be able to cook zombies from the inside out, causing the zombie to slowly expand, then explode. Not much else is known at this time.

You can also dual wield these, by pressing Left on the D-Pad. This will result in two separate handheld guns, dubbed the Voltage Rays. Similar to the Wunderwaffe DG-2, they shoot electricity, but the chain of electricity will be shorter.

Trivia

 * It is the first Dual Wielded Wonder Weapon in Zombies.