These Stun Knuckles will pack a 950,000 volt punch! The are excellent quality and perfect for self defence (or just for showing off- what a great conversation starter for a date!). A small trigger beneath the pointer finger allows you to activate the stun feature. The stun knuckles are made by a company called ZAP who has been one of the top manufactures of Stun Guns for years. These "Blast Knuckles" are covered in a soft rubber coating and the contour grip assures full control. The knuckles include 2 lithium batteries and a carrying case/holster.