for Oculus Quest 2 Upgrade T2 Elite Strap with 5000mAh Battery Pack Halo Strap VR Battery Pack for Oculus Quest 2 Accessories Elite Strap with 5000mAh Battery & Superior Safety Designed for Oculus Quest 2, with a built-in 5000 mAh battery, can extra extend using time about 3-4h for Oculus Quest 2, give you continue playing without worrying about recharging and have a better virtual reality experience. Built-in exclusive safety protection system ensures the safety of you and your devices, comprehensive multi-protect safety system includes overcharge protection, short circuit protection, temperature control, and more. Smart Charging & LED Indicators The battery intelligently distributes current to simultaneously charge the head strap and Quest 2. And comes with 4 led indicators, you can easily check the battery status with the battery indicator, which clearly shows the rest of the battery(25%/50%/75%/100%), making charging easier. Ergonomic Wearing Design The whole head strap weighs 400g, the top of the head cat-paw sponge design has a better weight distribution and takes the pressure off your face for a massive improvement in comfort. The back of the head has a larger & soft sponge, it can enhance head support, with comfortable PU leather for increased friction, easy to clean, and has a better anti-skid effect. Multi-point Adjustment Design There are 3 parts that can be adjustable: 1. The knob on the back of the head can adjust the circumference left and right to suit different head circumferences. 2. The two top contacts move forward or backward to adjust the tightness of our oculus quest 2 head strap. 3. The extra included velcro strap adjusts the length added stability and balance, better fit, and cups your head. Fits a head circumference of 19.3-26.8 inches, it can be used by most people.