Ocoopa UT3 Pro Rechargeable Hand Warmer Black on Black. Specifications for Ocoopa UT3 Pro Rechargeable Hand Warmer: Manufacturer: Ocoopa Application: Outdoor Gender: Unisex Color: Black Features of Ocoopa UT3 Pro Rechargeable Hand Warmer 3s Instant Heat Up Multiple Heat Levels 6-16 Hours Long Lasting Package Contents: Ocoopa UT3 Pro Rechargeable Hand Warmer Ocoopa handwarmers 2 Wrist strap 2 Portable pouch 1 Dual type-c charging cable 1in Ocoopa UT4102-BK-BK: UT3 Pro Rechargeable Hand Warmer Black on Black