Left ear only, Bose QuietComfort Earbuds, 2nd generation. Pairing and operation confirmed. Battery life is unknown as it has not been tested for extended periods. This is a used item, but there are no noticeable scratches or stains, and the appearance is generally in good condition. This is a listing for the left ear only, and the battery life is also unknown. Please understand the condition of the product described above before considering a purchase. Please refrain from purchasing if you are sensitive to used items. For electronic appliances, we have tested the operation of items that can be tested (items with untested operation are noted), but we do not guarantee their operation. Please understand and acknowledge this before considering a purchase. Also, to prevent swapping, we cannot accept returns or refunds after purchase. Please also be aware of this. Please be sure to check and understand the above conditions before purchasing. Storage No. a5(21)