MOQ100PCS. This portable hand warmer, crafted from plastic and aluminum alloy, ensures safety with a built-in explosion-proof chip that instantly cuts power during abnormalities. Featuring three adjustable heat settings (113℉, 131℉, 149℉), it allows you to customize warmth to your preference. Its slim, compact design fits perfectly in your hands or pockets, providing hours of continuous heat on a single charge to keep you warm and cozy. Ideal for outdoor activities, travel, or daily use, this ultrathin hand warmer makes a thoughtful gift for friends, family, or customers. Customizable branding options are available to showcase your logo or message.