KIWI design K4 Boost Comfort Battery Head Strap for Meta Quest 3 / 3S

The KIWI design K4 Boost is a battery-equipped comfort head strap for the Meta Quest 3 and Quest 3S, adding playtime while rebalancing the headset.

Key features:

• Up to 3 additional hours of playtime for Quest 3 and Quest 3S
• DualBoost power system charging both the strap and headset — full recharge in 2.5 hours with a 45 W adapter
• 25 W delivery to Quest 3S when used with a 45 W adapter
• Ergonomic rear headrest with thickened padding and counterweight to reduce facial and neck pressure
• 52-degree damping hinge and quick adjustment knob; weight 350 g
• Certified battery system with UL, EN and FCC certifications