Smok rpm 100 kit is driven by single 21700 or 18650 battery. RPM 100 Kit utilizes IML (In Mould Labeling) technique, which makes it durable and wear-resistant. And the 0.96 inch TFT display screen makes all vape data easier to use and read. You can adjust the airflow with the rotary air-inlet ring on the top of the device section. Compatible with Smok RPM 2 Coil (sold separately) and RPM 3 Coil (included). There has strong magnets between pod and device to enhance the tightness. In addition, with the ingenious locks, the pod is child-resistant. 6ml e-liquid capacity will provide a long-lasting vaping for you.