Stereo Headphone with Retail Package Bluetooth V4.1 AUX Audio Cable. Headset soft PU coated material, feels very smoothly without feeling heart ear when used. Built-in 300mAh Rechargeable Battery offers 14h of continuous hearing. Compatibility Fine Process Stylish Fashion Design. RB-500HB is equipped with high-quality speakers,two independent speaker chambers designed, gives users the clean sound with powerful bass and sound. Capable of connecting to two devices at one time Equipped with high-quality polymer battery system along with modern battery-saving saves you maximum energy, protects the battery and improve the shelf life of 1 charge Compatible with most audio devices currently on the market, ranging from intelligent devices for iOS & android or until the device connected via AUX port.