<br>✔This cigarette box can pack 20 regular cigarettes but not for 100mm'.<br><br>✔The cigarette box is recharged through USB interface of computer or mobile phone charger,the voltage rating and rated current is DC5V and 1.0A.<br><br>✔1.5 to 2 hours charging time is enough, overtime could decrease battery life.<br><br>✔please do not immerse.<br><br>✔USB cable is under the inside black shell.<br><br>✔Open the inner red case, the dropped cigarette ash can be cleaned easily.