【For Clearer Sound】Built-in digital chip, intelligent noise cancellation, multi-channel refined audio processing, making the sound you hear softer and clearer. Distinguishes between human voices and ambient sounds, enhancing voice clarity and amplifying sound up to approximately 35 times. 【Volume Adjustment & Two Modes】Manually scroll the volume adjustment knob up to increase the volume. Scroll down to decrease the volume. Two modes can be switched via the mode switch button, allowing you to freely choose a comfortable mode according to the usage scene and surrounding situation. (To prevent howling and echo, turn the switch to "L" after wearing and then turn on the power.) 【Ear-Hook Type & Compatible with Both Ears】The ear wire can rotate 360°, so it can be used on either the right or left ear. Long usage time and faster charging. Can be used for up to approximately 40 hours on a single charge. 【Lightweight at Just 5g】Weighs only about 5g, making it ultra-lightweight. Ergonomically designed for a comfortable fit that won't tire you even after long hours of use. Small and light, it doesn't stand out, making it recommended for those who care about appearance and fashion.