Lenovo HE05x earphone has 3D surround sound, 5.0 dual-ear chip, large capacity, true wireless Bluetooth. It uses a Graphene bass diaphragm, Hi-Fi high-frequency technology, 10mm dynamic speaker unit which is capable of giving perfect sound. It also has 5.0 automatic boot pairing, 5.0 Bluetooth game without delay, built-in active noise reduction IC which will not let you hear any sound from outside and you will feel comfortable talking with HD voice.