<p>Srhythm Wireless Bluetooth Headphones are made by a top R&D team. It is a classical product of Noise Cancelling Bluetooth Headphones that tested by a large amount of customers and has great reputation. Overall, NC25 is an excellent Active Noise Cancelling Bluetooth Headphones.</p> <p><b>Structure</b></p> <p>NC-25 bluetooth headphones are foldable and easily carried when traveling or outdoor activities.It is durable because of the high-strength plastic and inner metal connection shaft.</p> <p><b>Appearance</b></p> <p>NC-25 wireless headphones are suitable for most people especially for business persons because of the classic designs.</p> <p><b>Comfort</b></p> <p>NC-25 over ear headphones' headband and earmuffs are made with the extremely soft memory high protein leather.</p> <p>Materials&technology ensure long time comfortable wearing. The advanced sewing process makes sound isolation better.</p> <p>NC-25 is a valuable deal and classic product for the ANC Bluetooth wireless headphone.</p> <p><b>Note</b></p> <p>1.Connect to standard USB port,pls don't use fast charger</p> <p>2.Audio cable can be used when low battery</p><p><b>Top Q&A</b></p> <p>1.Why low sound?Because perhaps effected by devices/mobile.Pls increase mobile/devices' and headphone' volume to try again.</p> <p>2.Why no difference with ANC "on"VS"off"?Pls make sure that you start ANC and use it in the noisy environment.You will feel much difference.</p><p>3.How to turn off the headphones? Please note the ANC and Bluetooth show on the same indicator light.ANC with green light, Bluetooth with blue light.If you need to turn off/on bluetooth, please make sure you turned off ANC first.</p>