Feature: Ear-hook design: Ergonomic, anti-drop ear-hook, according to the shape of the human auricle, the force points of the ears are dispersed, so that the ears are evenly stressed, and the earphones will not fall off even during strenuous exercise. Deep noise reduction: The intelligent noise reduction for high-definition calls and the voice noise reduction technology for intelligent voice calls greatly optimize the clarity of the sound. High-definition surround sound quality: professional sound quality, 13mm high-quality moving coil unit, large composite diaphragm moving coil, bringing lossless HF sound quality; mid-low frequency diving surging, high frequency bright and transparent, creating your own version of the auditory feast. Composite diaphragm woofer, full and powerful bass; metal diaphragm high-frequency speaker, treble delicate and not harsh. Low Latency: The upgraded version of BT5.2 tends to have low latency, enjoy wireless freedom, fast transmission within 10m distance. IPX4 waterproof and sweatproof, 20 hours of battery life, one charge can be used for a week, with intelligent control. Specification: Material: ABS Color: Black, White(Optional) Battery: DC 5V 50mAh Horn Diammeter: 8mm Frequency: 20Hz-20KHz Package Size: Approx.8*7.6*3cm / 3.15*2.99*1.18in Package Weight: Approx. 30g / 1.06oz Package List: 1 * Headset 2 * Earplugs 1 * User Manual 1 * USB Cable