The RPM 2S kit from Smok uses a single 18650 battery (not included) and is compatible with RPM and RPM 2 Coils.
In the Box:
1 SMOK RPM 2S (18650 battery NOT included)
1 RPM 2 RPM 2 Pod (with 0.16Ω RPM 2 coil Installed)
1 RPM 2 RPM Pod (with 0.4Ω RPM coil installed)
1 USB Type-C Cable
1 User Manual
Compatible with RPM Coils, RPM 2 Coils, and RPM 2 Pods.