You have darkvision to a range of 120 feet.  

You have proficiency in the Stealth skill.  

When you make a Dexterity (Stealth) check made to hide in darkness, don't take darkvision into consideration when determining how obscured you are to a creature.  In darkness, you can add twice your proficiency bonus when hiding, instead of any proficiency bonus you would normally apply.  If you already add twice your proficiency bonus to a Stealth check, add +4 to the check.  

You have disadvantage on attack rolls and Wisdom (Perception) checks when you start your turn in direct sunlight.  

Your fangs are a natural weapon.  It counts as a melee weapon attack and deals 1d4 piercing damage on a hit.  You add your Strength modifier to the attack and damage rolls with this bite.  

Your Dexterity score increases by 2, and your Wisdom score increases by 1.

Batfolk generally keep to themselves and shy away from the company of other creatures.  They kill Underdark wildlife for food and act to ensure the survival of their tribe.  Many are neutral, sometimes tending more towards the chaotic side.  

Batfolk typically range between 4'6'' and 5'5".  They are furry but slim, with their wings making them look thicker than they actually are.  Many batfolk weigh between 100 and 140 pounds. Your size is Medium. 

Your base walking speed is 30 feet.

You have a flying speed of 40 feet. To use this speed, you can’t be wearing heavy armor.

You can speak, read, and write Common, Undercommon, and Auran.