Check the listing for details. 4 Channel 3.5' UTV/ATV/Snowmobile/Marine Amplified Speaker System Bluetooth. Color: Red, Condition: New. Listed at 78.99 USD. Notice: Battery is for the remote control, the item still need to connect to POWER DC 12V. it didn't include the battery to turn on the whole system, only for the remote. if you have any question about the item please contact us before you return it back, we will be here for help. 250cm supper long wire to allow you the put the speaker in most place as you can . 3.5"x3.5"x4" bullet head design, Not too big, not too small, perfect for ride. 2 styles of install option, allow you to have more option to in stall it more unique. Bluetooth wireless. allow you to connect Android phone or IOS system to plan music or just make it as an AMP. Competible with iPhone, Huawei as so on. Alarm Function keep your motor in more safe way, if someone try to move without your permission, it will alarm, Wireless Bluetooth hands-free motorcycle audio kit(Main unit+4 X Speaker)High fidelity stereo design, Large LCD display with function clockAllow you to listen MP3 music from Bluetooth device or FM radio without cable connectionBluetooth synchronous broadcasting,you will not miss the retransmission sport event,a special flash information of when your are on the roadSupport MP3 music from USB or SD/TF card(not Support 3.5mm external connection of MP3 players or iPod etc, not being a sound box)Support full-band FM channel(AM band is not available)Built-in high-sensitive MIC to support hand-free callHas warning bell when the phone rings,voice prompt when change modesremote control has a built in AUX input and background light for dark conditions2 X Pair of 3.5" 2-Way UTV/ATV/BOAT Mountable Speakers, these speakers can be mount on any roll bar with sizeof 20cm-25cm (mounting pads are included)Speakers cable length is 250cm allow you put the speaker on any place you want.Power Amplifier SpecificationPower: 4x25WSpeaker impedance 4-8ΩBlack ABS shell5Rated Voltage: DC 12VSpeaker Size(DxH):89mm(3.5")*102mm(4")Main Unit Specification:Input Voltage: DC 12V (36V-72V Model need an adaptor)Bluetooth V3.0+EDR, support AVRCP1.0,GAVDP1.0,AVDTP1.0,A2DP1.0Frequency Response: 21402GHz-2.480GHzPractical Sensitivity: 60dBEffective Transmission Distance: >10MFM Frequency Range: 87-108MHzMain Unit Size: approx 110mm(4.33")*83mm(3.26")*50mm(1.96")Package Contents:4 x Speaker1 x Main Control Unit1 x Wired Control1 x Remote Control4x Handlebar Clamp4X Scrow Holder1 x Set of Installation accessories