This uniquely designed masturbator is in a category all its own. A grip friendly. ergonomic design allows complete control over your stroker speed sensations. Featuring a combination of 30 rhythmic speeds and patterns. the Vibra Head is bound to give you the ride of your life. The interior of the hollow chamber is lined with pleasure inducing ridges. creating the ultimate in male satisfaction. The soft. specially shaped chamber is designed to enclose the head of your cock with powerful sensations. Lube up. place your penis in the end. and select your desired level of vibration. then let the Vibra Head do all the work! Measurements: 8.5 inches in total length. 4 insertable. 2.5 inches in diameter. Material: TPE. ABS Note: Requires (4) AA batteries. not included.