It's hard to get back.
1. Because the whole box of Bluetooth headphones is lost, it may be picked up by others or thrown into the trash can and other places, and the probability of recovery is relatively small.
2. If you want to find it, you can try to search the location or post a notice in the surrounding lost property office, but be prepared to not find it.
3. In addition, in future use, you can pay attention to the safety of the headset to avoid losing it again.