Product Name: AFTERSHOKZ AfterShokz Aeropex AS800 Bone Conduction Headphones Bluetooth Hands-free Product Contents: Bone Conduction Earphones Product Condition: Operation confirmed by playing music. There is a rattling sound when shaken, but it didn't bother me when wearing and using them. How about for commuting to school or the gym, or when running? Simple alcohol cleaning performed. Please understand that this is a used item before purchasing. Instant purchase is OK 24 hours a day. If you have any other questions, please ask in the comments. Shipping Method: Will be wrapped in bubble wrap and shipped via anonymous delivery. HP-60