A Brand new pair of wireless earbuds with Bluetooth 4.1, Unboxed it for the purpose of checking.
It works great sounds quality is impressive. 4-5 hours of non-stop music and 24 hr talk time. It's sweat/waterproof IPX5.
The case is portable battery bank with 2100 mah battery pack while headphones are 55 mah. The case can be used to charge other devices like a phone.