Oculus's Quest 2 Elite Strap comes with a battery and carrying case. The premium ergonomic strap gives increases and support. The built-in battery in the strap gives you extra time to play. You have to adjust your VR headset in the strap and connect it with the battery. The strap gives stability and is durable plus flexible. The battery is rechargeable and is long-lasting, so you don't need to worry about its power. The carrying case that comes along with it fits the headset efficiently, carries the battery with a charging cable and power adapter. Quest 3 elite strap and battery are perfect to have if you need for VR headset.