How many times have you been sitting in a theater enjoying a movie, only to have someone’s cell phone ring? What’s even worse is if they decide to answer the call, thus further disrupting your moviegoing experience. Wouldn’t it be great if you could ensure that no one’s cell phone could possibly go off? Well you can, with the Yapper Zapper.

This small device fits in your pocket and creates an 8 meter “quiet zone” where cell phone signals won’t get through. You’ll get about two hours of blocking on a single charge, which should get you most of the way through your movie. The $109 price tag might seem steep for a quiet movie, however, if you’re in the US, you can add up to $11,000 onto the price, due to the illegal nature of the device. In fact, you’ll be hard-pressed to find a place that allows the use of such technology, though many countries only have laws against using them, not owning them.