Long Battery Life The 500mAh high performance lithium battery ultra long battery life, after 2 hours of full charging, this bluetooth communication device supports 360 hours standby time, 40 hours music/talk time,much longer use time and safer. DSP Noise Cancelling Technology M7 helmet Bluetooth headset uses DSP windproof noise reduction technology, which can reduce wind noise during riding, so you can enjoy clearer music and voice calls. Tips:For safe driving considerations, when your motorcycle at higher speeds, in order to allow you to hear the surrounding clearly, so our helmet headset design volume will not completely obscure the other sounds on the driving road. Bluetooth 5.0 Technology Bluetooth 5.0 technology ensures more stable helmet communication and Bluetooth connectivity. Ensures you get more stable music during your ride and you won't miss any calls.Compatible with most Bluetooth devices on the market. Connection distance: 10~30 meters. Enjoy the FM Radio You can use the M7 headset to listen to FM radio stations. After powering up, click the Multifunction button and it will switch to FM mode (if the first click does not switch successfully, try clicking again to switch here). It will automatically search for all the FM stations you can currently receive, and you only need to press + or - to switch the stations you already receive. Click the "Multifunction" button again to switch back to Bluetooth connection mode. Even if you're out and about without your phone or when it runs out of juice, you can still get the latest news on FM radio. Suitable All Helmets The M7 motorcycle bluetooth headset can be easily installed on different types of helmet(Full Face Helmet,Half Face Helme,Open Face Helmet,3/4 Open Face Helmet,Off-Road Helmet,Skateboard Helmet,Vintage Motorcycle Helmet). Easy to install, just a few steps to operate, will not damage the helmet because of screws and other installation methods. Simple Panel Design Our M7 helmet bluetooth headset uses a simple enlarged button design to reduce the pitfalls of accidental contact during cycling or operating insensitive buttons when wearing gloves. When wearing riding gloves to operate the headset, it is common for some of the smaller and more cumbersome button designs to result in pressing the wrong button and not being able to use the headset properly during the ride. We have considered this defect and use simple button panel design, so that you can adjust the volume or switch FM more convenient during the riding. NOTICE: Any missing accessories after receive the packages , please ask us for replacement parts, like USB cable, sticker pads and so on.For any problem with the bluetooth headset for motorcycle helmet, Please Click our store name: VR robot →ASK A QUESTION. Frequently Asked Questions: Q: Why is the volume of the bluetooth headset really low? A: Please note that the volume of the headset can be adjusted with the''+" and "-" button, if you think the volume is too low, you can press the ''+" to increase the speakers volume. Q: Why my speakers have wind noise? A:Reconnect to bluetooth, and slow down the motorcycle ride when answering calls. Q: How to wake up the voice assistant? A:When you are connected to Bluetooth, press and hold the "pause" button for 2~4 seconds to wake up Siri voice assistant. Q: What is the after-sales policy when there is a problem after I purchase a product? A:We offer 1 year return and exchange service: Login to your Amazon account > select "Your Orders" > find the order ID > click "Contact Seller" > tell us your difficulties and needs.