Official Made for Meta CertificationThe E3 Pro Elite battery strap, specifically designed for Meta Quest 3/3S. As an official Made for Meta partner product, the E3 Pro guarantees quality and safety standards that meet Meta's rigorous certification requirements. Elite Design for Active VR and Extended UseThe E3 Pro battery strap features a lightweight, streamlined design optimized for active VR sessions. Integrated with BOBOVR's advanced B100 battery system, delivering improved weight distribution and optimized power consumption. BOBOVR B100 Hot-Swappable Fast Charging SystemEquipped with BOBOVR's exclusive magnetic hot-swap design, the B100 battery system features a 10,000mAh (5000mAh×2) capacity. Extends battery life by 135% for Quest 3 and 150% for Quest 3S, with 22.5W fast charging output. The smart display keeps you informed of real-time power status. Simply attach a fresh battery without removing your headset for uninterrupted VR sessions. Enhanced Audio IntegrationFeatures a built-in 3.5mm audio jack, providing versatile audio connectivity options - particularly beneficial for Quest 3S users who don't have a 3.5mm port on their headset. Elevate your VR audio experience with expanded external audio device support. Superior Comfort DesignEngineered for maximum comfort with large-area flexible support on both crown and rear padding. The flat back design ensures comfort even while lying down, while the adjustable dial fits various head sizes for stable and comfortable extended wear.