1 Pair Winter Smart Electric Heating Socks Breathable with 2500mA Rechargeable Power Bank Anti-Cold Washable Foot Warmer Heated Thermal Stockings Feature: 1. Power button operation: plug in the power supply (or portable battery), long press to turn on, long press to shut down. 2. Button mode: high temperature (three lights), medium temperature (two lights), low temperature (one light), click the button, cycle mode. 3. The high temperature is about 55 5 , the medium temperature is about 45 5 , and the low temperature is about 35 5 (the data of the third grade temperature is for reference only, this parameter is the test result of the surface temperature of the heating plate in the laboratory, using different environment, the actual temperature of electric socks will have deviation). 4. Fast heating for three seconds, using nanofiber wire for heating, intelligent charging, constant temperature to keep warm. Specification: Upper Material: Cotton Socks Foot Length: 180mm/7.09in, After Stretching: 280mm/11.02in Color: Black, White Package included: 1 Pair X Heated Socks 1 Pair X Power Banks