ROCKBROS Smart bluetooth Helmet Audio Riding Bicycle Bell Speaker Hands Free Phone Call Voice Navigation Waterproof IP54

ROCKBROS Smart bluetooth Helmet Audio Riding Bicycle Bell Speaker Handsfree Phone Call Voice NavigationSpecification Brand ROCKBROSColor Black bluetooth 2 0 Support for APP Android 2 3 Charging time About 1 hourSize Show as the pictureOperating voltage 3 4 4 3VWorking current 50mAWorking temperature 20℃ 50℃bluetooth connection distance 25mWaterproof IP54Battery 400mAH polymer lithium batteryAudio frequency response 120Hz 12KHzAudio distortion 1 Audio signal to noise ratio 60dBAudio output power 3WFunctions bluetooth connectivity support for android and IOS Handsfree answer phone Music player Voice navigation Voice search APP support for android Features Multifunctions can use for bike car helmet etc Recommended use for riding running climbing and so on With velcro and shockproof sponge easy to use USB charging one hour time full charging 82 hours standby Lightweight small body large energy If you want to know more about it lets see the following page Warning 1 Not includes USB cable you can charge it use your own android USB cable 2 bluetooth Support for Android 2 0 and IOS 2 0 3 APP only support for android 2 3 not support for iphone 4 Voice functions only support for Android system Package includes 1 x Helmet speaker1 x Pair of velcro1 x Shockproof sponge