Windproof and waterproof design ensures a stable connection. Equipped with noise reduction technology, high volume output, and extended battery life. This helmet headset delivers clear and high-quality stereo sound, compatible with all smartphones. Deep bass and crisp treble response effectively solve the issue of low audio volume during rides. A wireless helmet headset that automatically connects to your device, providing strong signal transmission and efficient cycling communication. Powerful signal performance ensures smooth and uninterrupted calls and music playback. The detachable nylon mount is easy to install and securely fits inside the helmet. Specifications: - Bluetooth range: 10M - Answering method: Automatic - Input method: Bluetooth - Speaker diameter: 50MM - Charging voltage: USB 5V - Frequency response: 80Hz - 20kHz - Distortion: Less than 1% - Signal-to-noise ratio: 80dB - Power supply: Built-in lithium battery 800mAh - Size: 6cm - Material: ABS - Color: Black Package Contents: - 2 x Headphones - 1 x Charging cable Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.