Model Number: Alf HT507-01 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 Interface micro USB, USB 2.0 Input 5V/1A (max) Output 5V/1A (max) Dimensions 103*44*24mm Functions hand warmer, power bank Colors silver, pink, black, red, green and OEM Certifications RoHS Directive-compliant, FC, CE, BSCI, ISO 9001 Guarantee 1 year