1Bluetooth 5.1: With the application of optimized Bluetooth 5.1 chip, E1+ helmet Bluetooth headset has faster data transmission speed and longer connection distance, making communication experience become more stable and reliable. 2Noise Reduction: Advanced noise reduction technology eliminates echo and ambient noise from calls, making the sound you hear clearer and more stable, with 3D stereo sound effect. 3Safety: Bluetooth motorcycle helmet headset with automatic answering allows riders to ride without stopping to answer the phone, reducing the possibility of distracting riders and improving safety on the road. 4Durability: Bluetooth motorcycle helmet headset is made with high grade Abs and metal materials that can improve its durability and longevity. 5Compatibility: Motorcycle helmet bluetooth headset is compatible with most of the helmet sound system on the market, which can be easily connected and used.