The Smok RPM 40 is small in size but has a battery capacity of 1500mAh and a power range of 1W-40W for you to adjust. The internal IQ-R chip is a new one, shortening the firing time to 0.001S, and the charging time to two hours. Also the newly designed RPM Mesh 0.4Ω Coil is designed for the best flavor and excellent vapor production.