1.Dual-side heat,high-capacity 2.keep your hand warm 3.Charge your ... material3. Two functions: warm your hands and charge kinds of digital products, such as mobile phone, camera, Ipad, Iphone, ... up in 30 seconds 5. Two choices for temperature adjustment:High : 48°C ± 2°C 4.5 hours of ... chargeable output voltage: 5V 0.5ATemperature (low: 40 degrees, high: 45 degrees)Charging temperature range: -20°C~50°C ...