No power?? small size?? convenient to carry?? good insulation effect.</br>The liner uses high-quality tin foil as material and design of velcro?? not only has good insulation effect but also can be easily cleaned.</br>Package Includes: 1 piece insulin bag + 2 piece ice pack (New)</br>Good to Know: Please put the 2 pieces ice packs in the refrigerator more than 6 to 8 hours before using the insulin bag outside. Put your insulin pen?? refill?? or insulin bottles into the designated areas of the bag.</br>Dimensions: 7.87*3.54*1.57 inches (L*W*H); Weight: 6.4 ounces; With 30 days money back?? 1 year warranty and easy-to-reach customer service.</br></br>Product Description</br></br><b>Specification:</b><br><br> 1.Size:20CM*9CM*4CM(L*W*H) / 7.87inch*3.54inch*1.57inch(L*W*H)<br> 2.Our Products use thermal insulation material and contain cold insulation liner <br> 3.Refrigerant has large cold capacity and good heat insulated property <br> 4.Portable?? fashionable and beautiful <br> 5