Uiisii Hi-905 uses the balanced armature frequency diving technology, the dynamic driver is responsible for low and mid frequencies, to double the bass performance, creating a feeling of rising and jerking atmosphere in which people feel immersed. With high resolution and high-frequency bandwidth of up to 40 kHz, the balanced fixture can display every detail of music penetratingly and vividly, giving you a real experience of the aural feast. Just enjoy it. Main features: Hi905 moving luminaire unit: high sensitivity, strong transient response, excellent high frequency decomposition, real and natural sound quality, recovery of more music details. Hi-Resolution Audio certified for frequency response up to 40 kHz, fully reproducing the audio and giving you a natural and lifelike listening experience. Applied with the oblique ear canal-fit-sound principle to fit perfectly into the ear canal Full metal and diamond-cutting anodizing process, elegant design; Built-in HD microphone, chat smoothly and freely with friends or family Control on the cord, convenient to adjust the volume, change numbers and make hands-free calls 3.5 mm gold-plated connection, compatible with the regular audiovisual devices In combination with 5 pairs of earbuds, suitable for different people Dustproof storage bag, easy to maintain and carry