This is the Gold standard for quality and innovation! The Impulse battery pak is the pinnacle in hi-tech design with 10 levels of speed and 5 functions of vibration, escalation, and pulsation. The pak uses 3 AAA size batteries, not included. The control pads are ultra sensitive and the pak has a unique clip-on design for hands-free enjoyment. The adjustable leg and waist straps are ideal for lovemaking. Use the Micro Butterfly's fluttering antennae for incredible clitoral stimulation too! Go for the Gold, it can be yours!