Features:  High definition sound  Unique, innovative, outstanding design  Compatible for iPod/iPhone/iPad from every generation (Bluetooth)  Smartphone compatible(Bluetooth or line in3.5mm)  Compatible with CD player or any other audio source through line in 3.5mm  Rechargeable battery  Compact and portable, convenient to carry Specifications:  Model: Sunglasses Bulldog  Connection mode: Bluetooth connectivity, 3.5MM audio jack  Interface type: USB/TF  Signal to noise ratio: 75dB or higher  Power supply: built-in lithium battery  Frequency: 60Hz to 15kHz  Battery capacity: 2000mAh  The broadcast time: 5-10 hours  Horn specification: 5.7cm, 8W  Distortion rate: 1% or less  Packing size: 13.5*12*16.5cm Package included:  1 x Bluetooth speaker 1 x audio line 1 x charging line 1 x retail box