On the basis of the original M1 belt, through the flexible support design, the fixing method of the back of the head is optimized, and the expansion interface is provided. Bring a more comfortable wearing experience At only 187g, it is lighter than most similar belts on the market. The side straps are made of a modified polymer material that is very tough. The newly upgraded head back plus strap-type flexible bracket is larger than the official strap-type bracket, which can adjust the stability and comfort of different head sizes Easy to wear. The back of the headband supports a 120 upturn, this design is very convenient for you to wear the headband up and down, ideal for users who wear glasses Comes with an extra set of honeycomb silicone pads for you to replace. Honeycomb pads are directly interchangeable with original PU leather pads. Both pads have their own characteristics. Allows you to choose the most suitable headrest according to different usage scenarios With a battery expansion port, it is convenient for users to use for BOBOVRs new battery docking accessories to upgrade to the battery belt version, and to achieve unlimited power supply through the alternate use of two B2 battery packs to avoid unnecessary waste B2 battery pack and battery base not included, these need to be purchased separately Product net weight about 187g Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.