Suddenly ran out of battery... ! For microUSB only Smartphone car charger. Charging your smartphone on the go is a pain (・・;) Convenient for times like that! You can charge it from your car's cigarette lighter socket. Plus, it's a reel type, so the cord (90 cm) retracts with a single push and doesn't get in the way. The switch button has a blue LED light. I'm selling it because I accidentally bought the wrong one... Color... White系 (White-based)