Where is the most special of Smoant Mobula RTA Tank?

Smoant Mobula RTA $19.99, It has a special design,With airflow direct to coils from Top and Bottom and Juice flow control for high VG.

Features:
1. Innovative RTA
2. 6ML Super Large Volume
3. Airflow direct to coils from Top and Bottom
4. Juice flow control for high VG
5. Velocity RBA with 2mm post hole
6. 17.5mm big built deck , super easy to rebuilt
7. Top refill juice with huge holes
8. Size : 25mm * 59mm
9. Adjustable 510 pin
10. Huge Vapor, Pure Taste
11. 304SS + Silica Glass
12. Available for Single and Dual Coil