2-in-1 Magnetic Hand Warmer: Use individually or in combination for a range of warmth and extended use as needed. Digital Display: Easily monitor power levels and temperature settings. 2-Second Heating: With 4 temperature options, enjoy instant warmth in just 2 seconds without long waiting. (Note: Use time is affected by the selected setting level). Quick Charge: Equipped with a dual-ended fast charging cable, both hand warmers can be charged simultaneously, reaching a full charge in just 3.5 hours. Suitable for Outdoors and Indoors: Ideal for any cold environment, also can assist in relieving discomfort from conditions like Raynaud's Syndrome. Cute Design: Our hand warmer, shaped like a penguin, is a warm and stylish accessory that lets you keep out the cold like a penguin in winter. They are a practical and creative choice for spreading warmth and cheer during the winter holiday.