Feature: 1: Open HIFI heavy bass headphones, gold label certification, more shocking listening experience, arc surface close to the ear, comfortable close to the ear. 2: 14.2mm composite titanium-plated dynamic coil, super large dynamic unit, diaphragm is more elastic, amplitude is larger, making the bass rhythm full, the mid-high pitch is more gentle and leisurely, and the sound is more layered 3: A single battery life of up to 8 hours, with the charging box, the battery life can reach 60 hours, the headphones support fast charging, charging for 10 minutes to listen to music for 2 hours. .