Bluetooth Headset ELECOM LBT-HSC20MPSV Silver Bluetooth version 5.0 compatible Frequency band used: 2.4 GHz Number of registered devices: 8 Charging port: USB Type-C Purchased last December and used for about 3 months with a MacBook Pro. However, I am selling it because it seems to have poor compatibility after switching to a Mac Mini. The rubber cover on the charging port has been cut off for convenience. One of the spare ear pads has been replaced. Included items: Ear hooks (for left and right ears) Spare ear pads x 2 Charging cable (Type-A to Type-C)