Stainless Steel 14 Goniometer 180 Dg X 1 Dg Pediatric Special Needs Saturation Sound Pressure Level (SSPL) Select Ear:Left Ear Saturation Sound Pressure Level (SSPL) 113dB Frequency Range 200 5000Hz Total Harmonic Wave Distortion ≤3% Reference Test Gain 27±5dB Input noise ≤32dB Sound amplification 29±5dB Max and comfortable toe finish * Contains microfiber yarns which wick away moisture to help keep feet cool dry and comfortable * Special formula helps prevent odors * Knee high: All day comfort band keeps socks up without binding or pinching * Thigh high: Silicone dot band provides convenience without garters or adhesives * A special finish makes the socks soft comfortable and easy to put on * Easy to care for machine washable * Looks 180 degree * Tension between the stainless steel arms is controlled by a thumb valve * Each unit has two opposing scales marked in specified increments * 10 degree INCREMENTS 14