1. Ultra thin headphonesMotorcycle helmet speakers thickness of only 0.3 inches, won't squeeze your ears, suitable for all helmets. The earphone speaker has a loud sound, and you can hear it when riding at high speed. The Bluetooth connection is stable and will not be disconnected. It is suitable for different helmet types. 2. 800mA battery Long Play Time The batteryMotorcycle Helmet Bluetooth Capacity of the earphones is 800 hours, which can play continuously for 90 hours. You don't need to charge them for a week when traveling outdoors. Connect two mobile phones at the same time, and the phone can display the battery level of the headphones. 3. Easy installationMotorcycle helmet bluetooth There are Velcro stickers in the headphone packaging box, with different models of Velcro stickers and clips. The headphones can be installed inside the helmet in 2 minutes. 4. Perfect Sound Quality Play loudCVC Noise Cancellation Stereo Music. Helmet Headphone DSP noise cancelling technology, Loud volume, this helmet headset transfers clear. Compatible with all the smartphones. Can be used for Riding motorcycles, skiing, horseback riding, MP3, GPS are supportable independently. Ensure can still let the other party hear your voice clearly when driving at high speed.