At CES 2014 Yellow Jacket showed off their stun gun case for the iPhone 5 and 5S, which comes one year after the release of the company’s iPhone 4 and 4S case.

Doug Aamoth from Time Tech got a chance to try out the case. He says the case is very bulky and can be cumbersome to carry around. The device runs off a battery, located in the case, but it still manages to pack just shy of one million volts, which is nothing to panic about.

Aamoth’s experience when getting zapped by the case was uncomfortable but did not lose any control. He says:

It feels like being knocked by a moderately aggressive electrical shock – the kind that almost takes your breath away, but not one that’d require an ambulance ride.

The case has a built in 1,800mAh battery which can power the device for about 50 zaps before it needs recharging. When you are not using the stun gun feature, the battery will act as a spare for your iPhone.

Yellow Jacket’s stun gun case for iPhone 5 and 5S will be available in February for $150. In most places this device is illegal, so please do check your local laws before you buy one.