Specifications Product name: heating scarf Product List: Heating scarf*1 (Without power supply) Featurtes 3 Adjustable Temperature Levels: The scarf is designed with one button with 3 heat settings. Red light (high setting 140/60), white light (medium setting 131/55), blue light (low setting 113/45). Fully Washable: The heated scarf is waterproof. It can be fully washed by hand in warm water below 40 C since it is designed with double-sided waterproof silicone switch and a heating pad that coated with water-resistant material. Targeted Heat Therapy: The scarf has the new heating technology. It utilizes Nano graphene heating element and release far-infrared rays to promote blood circulation and to help release neck muscle stiffness. Soft and Comfy Materials: The scarf is filled with cotton and it uses breathable material. This makes it comfortable against the skin and keeps you warm all day. The material is also ultra-light. The whole scarf is only about 150g. Be sure to hand-wash at a low temperature. Fast Heating: With the new graphene heating technology, after pressing the switch, you can feel the warmth of the temperature spread in your neck within 3 seconds..Warm Tip: The scarf need to be used with power bank. Power bank is not included. Note: 1. Due to the different monitor and light effects, the actual color of the item might be slightly different from the color showed in the pictures. 2. The color of the product is subject to the color received, please allow 2-4cm measuring deviation due to manual measurement, thank you for your understanding