Beyond 2000 products are known for their quality and design. They have always been the leader in technological pleasure advancements and now they take a giant leap ahead with the incredible GX4 technology! You control the shaft rotation, vibration and pulsations, plus the action of the spinning thrill beads. You control the vibrations of the beautiful hummingbird stimulator (each is separately controlled). The GX4 allows you to see the exact pleasure setting on its flat screen readout. Simply scroll through the different settings by pushing the soft touch buttons and view the image setting on the lighted panel. No more guessing what setting you?ve chosen. It?s displayed right there on the flat screen readout. All this, plus a myriad of choices are at your fingertips (beyond belief!). The soft glow screen panel takes this stimulator light years ahead of any other personal pleasurizer! The head of the penis has a diameter of 1?? while rest of the shaft is 1??. The shaft?s length is 5? to the magnificent hummingbird. The powerful Beyond 2000 GX4 requires 4 AA size batteries, not included. This GX4 is top of the line? Simply Magnificent!