Not until evening did Li Ming let out a long breath, holding in his hands a piece of mechanical equipment, which looked like a metal disc with a diameter of about one meter, divided into several sections from the center.
Placed on the ground, the central triangular metal pieces split outward, and from within emitted a glowing blue brilliance, dispersing an invisible field.
[Gravity Field Locking Device--Level C: A specially designed gravity field adjustment device.
...
Control Effect: Power Amplification--200%
Control Ability--Gravity Field Adjustment: Covers an area within ten meters, can increase gravity tenfold.]
This is the basic model, capable of achieving tenfold gravity suppression.
The reason he did not use that "for free" gravity adjustment device is because its gravity field could be adjusted both up and down, not only capable of doubling gravity but also of reducing it.