Basically all the upgrades we needed from the 1st model. (Although i still feel 1st model has better sound quality overall.) But we get ANC, better battery life, the fact that it disconnects when you put them in the charging case, better bluetooth connection, etc.
Sound is crispy clear and excellent! Best buy! Must buy for those looking for earbuds!
Awesome ear buds. Sennheiser audio never fails me. Best of the best!