Features: Quality material headband, hot forming process, scratch and wear-resistant, breathable, sweat-resistant and washable, comfortable to wear. Length can be adjusted freely, and the adjustment ranges is 38-52cm/14.9-20.4", which is suitable for more people to wear. Humanized designing with battery compartment position and wire hole, convenient for use of head battery and battery extension cable. Easy to install and dissesembly, convenient to carry and store, providing more comfortable experience. Distinctive pattern and bright color, will be the most favor for flight fans. Specifications: Item Name: Head Strap Material: ABS Color: Black, Gray, Green(optional) Length: Approx. 38cm/14.9inch Horizontal Adjustment Ranges: 38-52cm/14.9-20.4" Vertical Adjustment Ranges: 28-43cm/11.0-16.9" Applicable Models: for Digital Goggles and 99% FPV glasses and all kinds of virtual reality glasses in the market Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution. Package includes: 1x Headband