Feature: 1. Convenient Charging and Auto Heat: Coffee mug warmer with USB charging. When the mug is placed on the power base, the heating and heat preservation function is automatically activated. Ideal for warm your favorite drinks like coffee, milk, chacolate, hot coco, ect. 2. 131-149℉ Intelligent Constant Temperature: Beverage cup warmer built-in intelligent heating module, keep your coffee and hot beverage in 55-65℃/131-149℉ in 24 hours, enjoy warm beverage anytime. 3. Premium Double Layer Cup: Coffee mug made from double-layer food-grade 304 stainless steel liner, thermal insulation and keep constant temperature. Not rust, safe to use and easy to clean. 4. Leakproof and Dustproof Lid: 300ml/10.5oz capacity cup with transparent PC cover, built-in silicone seal ring, leak-proof and dust-proof. The cup cover has a push-pull hole, you can put a straw in it, or you can push open the cover hole and drink directly. 5. Thermal Insulation and Safe Protection: Thanks to the wireless inner core induction heats up, the cup body and heating base do not get hot. The temperature control chip has an overheating protection, safe and comfortable to use. Specification: Features: Convenient Charging and Auto Heat: Coffee mug warmer with USB charging. When the mug is placed on the power base, the heating and heat preservation function is automatically activated. Ideal for warm your favorite drinks like coffee, milk, chacolate, hot coco, ect. 131-149℉ Intelligent Constant Temperature: Beverage cup warmer built-in intelligent heating module, keep your coffee and hot beverage in 55-65℃/131-149℉ in 24 hours, enjoy warm beverage anytime. Premium Double Layer Cup: Coffee mug made from double-layer food-grade 304 stainless steel liner, thermal insulation and keep constant temperature. Not rust, safe to use and easy to clean. Leakproof and Dustproof Lid: 350ml/12.3oz capacity cup with transparent PC cover, built-in silicone seal ring, leak-proof and dust-proof. The cup cover has a push-pull hole, you can put a straw in it, or you can push open the cover hole and drink directly. Thermal Insulation and Safe Protection: Thanks to the wireless inner core induction heats up, the cup body and heating base do not get hot. The temperature control chip has an overheating protection, safe and comfortable to use. Specifications: Main Material: 304 Stainless Steel + PC Color: Black Cup capacity: 350ml / 12.3fl.oz Power supply: USB Input: DC 5V-2A Cup size: 88 * 115mm/3.5 * 4.5in Base size: 118*118*13mm/4.6 * 4.6 * 0.5in Weight: About 395g / 13.9oz Packing List: 1 * Cup 1 * Lid 1 * Base 1 * Charging cable 1 * Manual Package List: 1 * Cup 1 * Lid 1 * Base 1 * Charging cable 1 * Manual