The Twist Kit by Smart as the name implies, is intended for the new eCigarettes user. The device is simple to use and able to meet the needs of a new vaper who is often transitioning from tobacco smoking to eCigarettes. This device comes with the Smart(R) Atomizer which is simply replaced when burnt out and a 900mAh battery. Enough battery power to sustain a day of moderate vaping. All Smart e-liquid products available here are compatible with the major brands of e-cigarettes.