Lightweight and comfortable, fully fits the auricle Equipped with dual headphone diaphragm and 10mm loundspeaker unit improving the effect Comes with a long battery life without trouble about frequent charging BT 5.0 technology, low latency and low power consumption Dual hosts, no distinction between primary and secondary Smart touch control, compact and light weight both well fit ear canal without burden IPX4 Waterproof, well withstanding sweat, rain and dust