At level 1 your wings are only strong enough to slow a fall, with similar effect to the spell feather fall. 

At level 5 your wings gain the strength to fly 15 feet. It increases to 30 at level 10, and 40 at level 15.

Heavy armor makes flight impossible. 

Your Charisma score increases by 2, and one other stat of your choice increases by 1.

Like their human parents cambion reach maturity at 20 years, but can live for a few centuries.

Cambion have an innate tendency toward evil, but depending on whether they were raised by fiends or humanoids, their upbringing may influence them. 

Your creature type is both humanoid and fiend. You can become the target of any ability, spell, or affect that effects either of your creature types. These include spells such as detect evil and good and a Paladin's Divine Sense. The blood of the lower planes lives in you.

Cambion can be as tall or as short as humans, ranging from 5ft to 6ft tall. Your size is Medium.

Your base walking speed is 30 feet.

Thanks to your fiendish heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You have resistance to fire damage.

The cambion can innately cast a number of spells, requiring no material components. Their spellcasting ability is Charisma, and the DC is 8 + your proficiency bonus + CHA modifier. 

Starting at level 1, you can cast detect magic once per long rest. Starting at level 3, you can cast alter self once per long rest. Starting at level 5, you can cast produce flame once per long rest. Starting at level 8, you can cast command once per long rest. Starting at level 13, you can cast plane shift (self only) once per long rest. 

You can speak, read, and write Common and either Infernal or Abyssal.

You have a supernatural touch to your beauty and you're charming by nature. Once per short rest, you can gain advantage on a persuasion or deception roll against a humanoid creature.