It's a smart gun for laser tag. HeX3's AppTag Laser Blaster, which began as a Kickstarter project, claims to bring first-person-shooter gameplay to smart phones in the literal sense.
The AppTag attaches to your phone with a pistol grip, a rubberized trigger, and several adhesive clips, all of which come included. Download the AppTag apps and, just like that, your smart phone provides an augmented-reality game of laser tag, turning your backyard into a battlefield.
Not only does the AppTag communicate with your smart phone to set the scene, but it also uses a focused infrared beam and sensor to target opponents as it relies on infrared senders, a wireless mobile technology used for device communication over short ranges. Your phone keeps track of the score.
The unit includes a headphone jack for sound effects and walky-talky communication. It's available for Apple and Android devices for $59.99.