Waterproof Bicycle Bike Sports Wireless Bluetooth Stereo Speaker Handsfree Mic DescriptionDurable rubber all round protectionWeatherproof protectionPlayback 3 hours max volume longer on lower volumeHandsfree with built in microphoneProvides clear sound deliveryRechargeable lithium BatteryWith Answer call pause\/play skip tracks forward\/backwardsAll buttons are water insulated and charge port has a integrated plug.Perfect for Cycling or any outdoor adventurers， speaker mount adjustable.Compatible with any Bluetooth devices SpecificationsBluetooth 3.0Power supply: Built In 3.7V  400mAh lithium rechargeable batteryRated Voltage: DC 5VRated Impedance: 4\u2126Rated Power: 3WCharging\/Working time:3 hoursSNR: 84 dBSpeaker: 3W， 4\u2126Transmission Range: up to.33 feet (10 meters) in open areaFrequency: 2402MHz - 2480MHzISM BandProduct: Dimensions:6.5x6.5x13cmColor: Red， Blue Pairing:1.Long press the power button till the speaker make a sound2.Turn on the bluetooth device of your cellphone， and searching the bluetooth device 3.Normally it will not need pairing pass word， but if it is needed， pairing pass word is 0000. Package include1x Bluetooth Speaker1x USB charge cable           1x English User Manual More detail: