Four-core dual-moving coil unit, powerful sound effect; high-fidelity sound quality. BT 5.0 technology provides low power consumption, low latency, and fast and stable transmission. TPE material that is gentle on the skin, an in-ear design that fits the ear canal, and is comfortable to wear The magnetic suction design eliminates time-consuming storage steps that are difficult to win or lose. The built-in 210 mAh battery ensures a long endurance time: 10 hours of music time, 200 hours of standby time; no need to be concerned about power shortage. The transmission speed is faster, the call has no delay, the anti-interference ability is strong, and the signal is more stable. intelligent noise reduction to reduce noise interference and make calls clearer. The dual-motion ring produces a wide range of frequencies, with a strong bass and mid-frequency protrusion. It has no warranty.