Savior Electric Heated Socks For Men And Women, With App Control, Etc. 2022 NEW UPGRADE: SAVIOR HEAT as the outdoor sports heating products industry leader,in technology has been steady progress,step by step,in maintaining the original technical advantages on the basis of the active introduction of new technologies.2021 began to develop Mobile APP operation heated socks,after repeated research and testing,2022 officially put on the market,will bring consumers a new experience . TRADITIONAL BUTTON OPERATION:Our heated socks still retain the push button switch because simplicity is still the most reliable.Compared to other fully APP-controlled socks,when the wireless connection is interfered with,or the APP download is unsuccessful,or the phone runs out of battery, the heated sock will become a waste product.We insist on hand sewing,so our socks are available in 4 sizes,suitable for most people,while the market is usually single size mechanical sewing socks. APP OPERATION:When you are exercising outdoors,you don't need to pull up your pants,APP can control the socks,which is very convenient.You can combine/control the left and right heated socks separately,which is more user-friendly and convenient compared with other socks on the market that can only be controlled separately.It has a timing function(0-3 H,Others0-2 H).It uses high quality7.4V Li-polymer Battery,compared to the cheap 3.7V 18650 battery,higher energy density,smaller size. SAFE WIDELY APPLICABLE: The heated socks have passed various safety certifications.Safe and reliable.With it,you can go running,riding a motorcycle,biking,skiing,skating,hunting,fishing and other outdoor activities in winter.For cold storage,outdoor or other work.Using infrared heating can stimulate blood circulation.It is very suitable for people with Raynaud?s,arthritis,bad circulation,and stiff joints.So it is also a very good gift for relatives and friends,a very good Christmas gift. AFTER-SALES WORRY-FREE: The heated socks contains 4 sizes of S-XL,which can be worn by adults and teenagers.Please fully charge it before using it for the first time (about 3.5 hours).All purchases of our products are provided with a free one-year quality guarantee.For any quality or use problems,please contact us through the Amazon"Contact Seller"channel,we will solve your problem in time,we have an after-sales service center in the United States,please rest assured to buy.