Bluetooth wireless helmet earphone with high-fidelity stereo supports stable and fast signal transmission within 10 meters.Built-in high-sensitivity microphone with windproof sponge cover that enhances voice quality.Ultra-safe cycling experience with this hands-free helmet headset which supports automatic answer, voice assistant(compatible with Siri), English voice prompts when on, off, pairing, maximum volume, and low battery . And you can check the remaining battery Suitable for most motorcycle helmets, easy installation with included hook-and-loop fasteners.Colour:blackMaterial:plasticPackage Contents:1 x Helmet headset kitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.