Visco GEL Arch Support Wrap Large XL Men's 20 30 Socks 9N) 1N(1000N 1335N) * Battery 14272 9N) 1N(1000N 1335N) * Battery Life: 6 8 hrs powered on 30 minutes after low battery condition * Charge Time: 80% charge => 45 minutes Full charge => 2 hrs * Data Storage Capacity: 150 tests * Calibration Points: 31 point (Every 10lbs 0 300) * Preset Test Length: 0 Feature 6: sport bands Stretchable fabric with hook and loop closure positions a soft silicone gel cushion under the arch * Designed to wear under or over socks or when barefoot * Thin profile fits comfortably in most footwear * Washable and reusable for months * Fits left or right foot