Product Features Magnetic Design Snap together or use separately, compact and easy to carry. Instant Heat Heats in 3 seconds, 3 levels up to 126 F, lasting 4 6 hours. Dual USB-C cable included for faster charging. Ultra-Compact Lipstick-sized, only 2.8 oz, designed for smaller hands and fingertip warmth. Safe & Reliable AI smart chip with 1200 checks/min plus official UL certification for safe use. Perfect Gift Great for camping, skiing, golf, or anyone with Raynaud s, arthritis, or cold hands.