The Scorpion SP400kv stun gun is the best full-sized you can buy. The power this device gives makes you feel like you have been shocked and hit at the same time. Not many guns hit this hard. The Scorpion 700 also has a personal alarm and safety switch. Comes with a belt clip, heavy-duty nylon holster and a lifetime warranty. This model operates on two 9-volt Energizer batteries (sold separately). Size: 5 7/8" x 2-7/16" x 1-1/2"