Med-ePen Executive Black & Silver refillable vape pen is specifically designed with the business professional in mind. Our largest capacity battery ensures your vaporizer pen will not lose its charge before a big meeting and pen cap provides you the discretion you deserve while away from your home. Discrete Professional Design Long Battery Life, 600 Puffs Push Button, Lock/Unlock Feature Weighs 26g 3.3 -4.2 volts, 650 mah 510 Thread Includes USB Charger