Optimum Power Ultimate Power Stroker has 7 independent functions of intense vibration, pulsation, and escalation.4 rows of extreme stroking beads with 3 speeds of independent stroking action. The sleeve is textured, super stretchy and removable for easy cleaning. Self contained, easy to store masturbator with snap on storage lid. 

Sleeve: 5 inch x 3.5 inch / 12.75 cm x 9 cm 
Overall: 8.5 inch x 3.5 inch / 21.5 cm x 9 cm 

Requires 4 AA batteries (not included)