Glazata EC200 White Ultra-Large Capacity Battery: * Built-in 260mAh large-capacity battery. * 30 hours of continuous talk time. * 40 days of standby time. * Effectively solves the problem of low battery in Bluetooth earphones, freeing you from the constraints of music and calls. * Enters Deep Sleep mode automatically if the paired phone is unused for 10 minutes with pairing turned off, reducing battery consumption. * The CSR8615 smart chip Bluetooth processor has acoustic echo and noise reduction functions, and incorporates an 80MIPS Kalimba DSP core, equipped with technology to eliminate surrounding noise, providing clear call quality. Stress-free listening, such as not missing anything. Compatible with music and streaming media. * CVC6.0 Smart Noise Reduction: A powerful noise reduction algorithm that combines CSR's CVC technology, a special silicon mini-microphone, and DSP functions, incorporating a 20-channel mono equalizer and noise reduction and echo cancellation functions. Compared to general Bluetooth earphones, the sound quality of calls and the microphone quality are better, with low noise and high sensitivity. With DSP's CVC6.0 technology, dual microphones, and digital signal processing (DSP), it reduces surrounding noise, achieving a more natural and distortion-free clear sound quality. Effective noise prevention enables stereo voice calls. * Compared to general Bluetooth earphones, the sound quality of calls and the microphone quality are better, with low noise and high sensitivity. With DSP's CVC6.0 technology, dual microphones, and digital signal processing (DSP), it reduces surrounding noise, achieving a more natural and distortion-free clear sound quality. Effective noise prevention enables stereo voice calls. ※ Although it is new and unused, there is some slight dirt on the cable due to the manufacturing process. There is no problem using it as a product.