AirPod max is a few months old, without dents or scratches but has a defect (explained below) ???? When disconnected from phone for about 20-30 minutes the AirPods goes into sleep mode and won’t come on using the power button but rather will have to be plugged on charge for about 3-10 seconds to come on, aside from this it stays connected to your phone for as long as you want it to, has no technical issues sound quality is perfect as expected, with active noise cancellation and transparency.