[*USB Design: Using the charging cable with built-in chip can effectively prolong the service life of watch. *Designed specially for Smart Ring Smart Hand Fitness Ring Watch *Easy To Carry: You can easily store this USB cable in your bag and take it anywhere you go. It is also ideal for leaving at the office or storing in your car. *Replacement charger for your Smart Ring Smart Hand Fitness Ring Watch will No More "Dead" again. You can charge it at home in office in car or on travel. Make your Smart Ring Smart Hand Fitness Ring Watch charging become more convenient. *Interface: micro usb. Charger Dock ONLY Smart Ring Smart Hand Fitness Ring Watch not included!!]