JR USB Rechargeable Battery Build-in Mic Charging Smart Design Portable Bluetooth Wireless Super Bass Powerful Sound Round Shape Design 3D Surround Speaker with Car speakerphones function(Sliver) STRONG AND HIGH FIDELITY TONE: - Can play the super low frequency dynamic bass rich music effect EASY SETTING: - Bluetooth to connect of your smart phone/ computer LOW POWER CONSUMPTION: - USB charging 3-4 Hours can use 8hours continuous PHONE SPEAKER FUNCTION: - Connect your smart phone can bring the clear calls for you SHARE THE MUSIC TO YOUR FRIENDS: -The user can share the pure music to other friends on everywhere