Model Number: Alf-HT322 Brand Name: Aoolif Key Specifications/Special Features: Product details: Product nameUSB hand warmer Materials ABS plastic + aluminum Battery cell Li-ion battery, 18650*2 pieces Battery capacity 4400mAh Interface Micro USB, USB 2.0 Input 5V/1A (max) Output 5V/1A (max) Dimensions 90*60*24mm Functions Hand warmer, power bank, LED torch Heating temperature 47 ±2℃ Heating time 3-5 hours Colors Silver, pink, black, blue, green and OEM Certifications RoHS Directive-compliant, FC, CE, BSCI, ISO 9001 Guarantee 1 year