... Wireless bluetooth SpeakerCE ROHSProduct Parameters:Bluetooth Specification :V2.1+EDR Class IISurpport Mode:A2DPFrequency range:2.4GHZRated Charging ... 7VCharging Volt:USB 5VColor : Multi color optional How to use this Bluetooth Speaker ?1, Press the switch of the golf ball ... Unique Trait1,Widely used ,great compatibility2,Easy to operate, only need to Match then can use3,High Speed transmission ...