This 10-mode extreme CBT ball-crushing device is electrified internally, for intense sensations and rhythmic stimulation. The easy-to-use controller lets you cycle through all 6 intensity settings, and the adjustable screws let you control the pressure. The durable boards let you apply an intense squeeze without letting you down. Measures 5.5 in. long, 5 in. wide. Requires 3V cell battery, included.