3 Heat : Electric heated hat has 3 levels smart temperature controller, providing the most appropriate temperature according to various needs. Press on/off button to free adjust the temperature . Fine workmanship and perfect style. Premium Soft Fabric Cap: Heated hat made from Polyester fiber+, plus breathable and heat-insulated function, can both resist cold outer and insulate inner warmth, providing enough warmth for head in winter. Rapid Heating Hat: heated hat adopts heating technology, providing fast and stable heating in both sides of ears. The ultra-light, ultra-thin & ultra-soft heating panels can be heated continuously for 4 hours. Recommend to turn on the highest heat setting for the first 3-10 minutes, then switch to other setting. Colour:black :Polyester fiber + Package Contents: 1 x heated hat(excluding power bank) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.