h device with the buttons on the STN-05 headphones.* Stereo Effect: use the white magnetic for the speaker mateiral.* Method of wearing: neckband.* STN-05 headphones come with a built-in rechargeable battery,Website:http://www.smartcoolproduct.com, prior to using it.Warranty Details:Certificates: CE,ROHS,FCTransmission distance: 10mCharging Interface: Micro USBIP Grade: IP67