This hand warmer is equipped with a high-quality battery, a safety protection system, 3 temperature levels, and double-sided fast heating. It is made of high-quality aluminum and ABS, has good thermal conductivity, is denser, and is drop-resistant. Choose from various colors. The price drops from $35.99 to $12.99 when you apply the coupon code "50WCOIVB" at checkout. Shipping is free for prime members or nonmembers get free shipping over $25.