Your genes are modified, making you a 100% pure Kryptonian. You gain powers similar to Superman. Super strength and tactile telekinesis, super speed, flight, nigh-invulnerability, enhanced senses, improved cognition, heat vision, cold breath, and super regeneration.
While you are exposed to yellow sunlight, your powers work at their maximum. Without it they are reduced gradually, until they are completely drained. Though this process would take a considerable amount of time, and could go on for months on end under no yellow sun, without any significant reduction to your powers.
Kryptonite crystals won't affect you anymore, but if you were exposed to red sun radiation, you would lose your powers.