<b>WARNING</b><br>-Do not immerse.<br>-Keep away from children.<br>-Do not connect with power supply when fully charged <br>-USB interface will turn blue when charging but sometime it will take minutes to turn blue<br>-This cigarette box can pack 20 regular cigarettes but not for 100mm'.<br>-The cigarette box is recharged through USB interface of computer or mobile phone charger,the voltage rating and rated current is DC5 ±0.25V.Before charging,please press the switch,then plug in the power cable. <br>-1.5 to 2 hours charging time is enough, overtime could decrease battery life<br>-USB cable is included<br>DO not touch arc wire when igniting<br><br><b>There is a protective film on the case surface and it might be scratched during transit.Please peel it off before using and it is not defective.Thank you.</b>