Vegeta, again, is the only one to have achieved this form in the Dragon Ball franchise. Unlike the Ultra Super Saiyan, where ki and energy are constantly being reduced in the form, ki and stamina are slowly reduced, approximately 43% ki are being drained every 30 minutes. However, the saiyan's stamina is being reduced by 84% every 4 minutes, so sustaining the form is very tiring, but doesn't use to much ki to sustain.
In this stage, the saiyan is similar in appearance to the Legendary True Super Saiyan form. The skin of the saiyan may become slightly redder due to increased blood flow, and muscle size is increased to the point of practical ridiculousness. The red aura no longer flows upward, but flails outward, with surges of bio-electricity becoming more frequent and prominent. The eyes are glowing and beaming red. And with red electricty as powerful as lightning flowing out of the eyes when transforming or raising power. The entire eyeball is glowing red constantly in this form. Anything that requires the saiyan to use ki is colored red.