Buy Shock-You-Friend Electric Shock Ball Pen (Practical Joke) Online Store lightinthebox.com. Overview:Convincing Ball-Point.Black plastic and metal pen with clicker on top.Press clicker to shock. Measures 14.5cm long.1x AAA battery included. !Warning! Emits electric shock.May interfere with electrical devices such as pacemakers.Keep out of reach of children and patients. Novelty gift item, this is NOT A Toy.