Shenzhen Winna Electronic Technology Co., Ltd. manufactures and supplies batteries, battery chargers, power adapters, power switches, bluetooth headset, bluetooth speaker, portable power bank， battery powered heating jackets, heating insoles, heating socks, heating gloves, heating shoes and boots to the world. Major markets are North America, South America, Europe, Korea, Japan, Russia and other Asian countries. Welcome to contact me: DAISY.CHANG@HOTMAIL.COM Thank you!