Introducing the B4 wireless earphones, featuring V5.0 wireless technology and a 10mm drive unit for superior sound quality. With a transmission distance of over 10 meters, you can enjoy your music without being tethered to your device. These earphones have an impedance of 32Ω±15% and a sensitivity of 93dB±3dB, ensuring crisp and clear audio. You can listen to your favorite tunes for up to 5 hours or talk on the phone for up to 3.5 hours on a single charge, thanks to the 3.7V/110mAh battery capacity. Charging is a breeze with the Micro USB/ DC5V/ 500mA input voltage, and takes only about 1.5 hours to fully charge. With a standby time of approximately 188 hours, you can be sure your earphones are ready when you are. Whether you're at home, in the office, or on the go, the B4 wireless earphones are the perfect choice for anyone who loves to listen to music or make calls on the move. Get yours today and experience the freedom of wireless audio!