SD-1001 Dual Mode "Bluetooth-FM - sd card -Wireless Headphone - Black

OverviewIt has been designed with a perfect fit to make it comfortable and simple for long-term use. Features closed speakers for better sound isolation. Use Bluetooth or aux connection - Having a TF card port Version : 5.1 Driver size : 40mm Frequency Response : 20Hz - 18KHz Impedance : 32 Playback time : 6~8hours Charge time : 2hours Battery : 3.7v 400mAh warning: do not disassemble this product ensure responsible use of the headphones do not expose this product or any of its components to water, fire or high temperatures or damp areas do not attempt to use this product when performing tasks that require your full attention