Baseus Magnetic In-ear Earphone is built with 20Hz -20KHz frequency range. It is generally use for Cellphone. In this Earphone Bluetooth V4.1 connection, people can enjoy favorite music through wireless technology, it also built-in microphone that supports hands-free phone conversation. it can simultaneously connect two smartphones. The Earphones in-ear design provides good noise isolation for clearer sound. In this Earphone 45mAh battery is added, which is long stand-by time and music time Magnetic charging, convenient to use ,Small and lightweight, easy to carry. ABS metarials is used in this earphone. This earphones Communication distance range is about 7-8 meters, with 100 hours Standby time, ≥ 4 hours call time, ≥ 3 hours music time and charging time is about 1.2 hours. The Magnetic In-ear is compatible with iPhone, iPad, Samsung, HTC, Huawe,i etc. smartphones and tablets, Other Bluetooth-enabled devices with CE, FCC, RoHS certificates.