12oz. Self-heating coffee mug Three adjustable temperature levels: 135°, 140°, or 145° F Built-in rechargeable battery keeps your beverage perfectly warmed or up to 2 hours, or keep it on the charging coaster for prolonged heating Auto-shutoff safety feature after 3 hours on charging coaster, or is mug is empty Anti-spill lid keeps drinks in your cup, not on your lap Perfect for coffee, tea, hot chocolate, and more Mug is safe to handwash with sturdy stainless-steel design Includes charging coaster, lid, and power adapter Specs: Input – 12V/1.5A; Power – 18W; Battery Capacity – 7.4V/2000mAh