Question: what is the difference between jaybird x3 and x4?
Answer: The Jaybird X4 are fully waterproof Perhaps the biggest difference between the Jaybird X3 and X4 is with their durability against water. ... The Jaybird X4, on the other hand, come equipped with an IPX7 rating, meaning they're guaranteed to survive up to one meter of water submersion for up to 30 minutes.