BOBOVR M3 Pro Battery Pack Head Strap Accessories, Compatible with Meta Quest 3/Quest 3S,Reduce Facial Stress,Magnetic Battery Swap Design

• Compatible with Meta Quest 3/Quest 3S: Reduce facial pressure, It adopts a suspended design and supports multi-point adjustment, which evenly transfers the original facial pressure of the host to the head. If you want, you can even remove the facial interface to fully enjoy the transparency of MR mode.
• Power supply is more convenient: The battery pack adopts a magnetic quick-release design, and the battery can be detached and charged, which does not affect the use of VR host. Two battery packs are hot-swappable for unlimited battery life (the second battery pack needs to be purchased separately).
• Reducing the weight of the head battery: We designed a dedicated battery pack B2 for the VR host, which weighs only 140g, which can balance the front and rear weights. Compared with the traditional power bank, the burden on the head is significantly reduced.
• Double the battery life: The battery capacity of a single battery pack is 5200mah, adding about 2 hours (APP depends) of VR time.

Basically brand new. Just did not end up using this and stuck with the factory head strap since that one fit in the case I had purchased.