Item Type: SpeakerMaterial: ABSColour: BlackPower: 8Wx2Operation Mode: ButtonBluetooth Version: 4.2+DERSpeaker: 2 x 4in SpeakerBluetooth Distance: Approx. 10-15m/ 33-50ftSignal-to-Noise Ratio: 80dB Connection Mode: Bluetooth ConnectionBluetooth Name: BTSPEAKER Remote Control Battery: Built-In Button Battery CR2025,150mAh Speaker Battery: Built-In 18650 Battery, 3000mAhPackage List1 x Speaker1 x USB Data Cable1 x Microphone1 x Remote Control1 x Strap1 x Connection Line1Large volume, colorful LED, wireless Bluetooth, button control, surround stereo, FM radio, HIFI sound quality. 2Support microphone and audio cable connection, microphone cable is 2 meters long, easy to use. 3Support memory card, U disk, MP3 format, charge about 12h, continuous playback time 710 hours (according to the volume). 4Compatible with various Bluetooth devices, for Android/IOS, and can be connected with your phone, notebook, for SPS and other digital devices. 5Suitable for dance, morning exercise, promotion, street stall, outdoor activity, families, etc.