Model Number: Alf-HT501 Brand Name: Aoolif Key Specifications/Special Features: FAQ:Why choose us?1.Excellent service:We committed to our customers’ satisfaction and have professional after-sale service. So if you have any problem, please feel free to contact us.2. Strict quality control:We always put the quality of products at first place, from purchasing of raw material to the whole process, we have strict requirement to ensure product quality. All products and accessories have at least 3 times quality test.3. Quality guarantee:24 months warranty is provided Product name USB hand warmer Model HT501 Materials ABS plastic + aluminum Battery cell Li-ion battery, 18650*1 pieces Battery Capacity 2000mAh Interface micro USB, USB 2.0 Input 5V/1A (max) Output 5V/1A (max) Dimension 90*41*15mm Functions hand warmer, power bank Heating Temperature 47±2℃ Heating Time 3-5 hours Colors silver, pink, black, red, green and OEM Certifications RoHS Directive-compliant, FC, CE, BSCI, ISO 9001 Guarantee 1 year