 Compatible with both iOS andAndroidsystem Perfectly adapted with the standrad specifications of sizes22mmstrap Matching your style, freely collocation your own watchandstrap Aviation class materials, CNC High-Strenth Maching Super-strength LED glasses，processing by the 3Dcraftingtechnology Waterproof level IP56, sweat protection, outdoor 1st choice Communication and Health Management function FOTA Distal firmware update technology, a varietyofself-developed software applications