Built-in magnet switch, earphones, can be turned on/off automatically when the magnet separates/attracts, intelligent prediction of your requirement, no need any key operation, enjoy your music in the next second. Built-in magnets allow you to clip the two earbuds together when not in use, and wear as a necklace around your neck for a practical way to carry. Latest Bluetooth 4.1 pairing with smartphones instantly. Bluetooth signal has 10m stable transmission distance. It supports two devices connected simultaneously and connects automatically after being successfully paired for the first time. This wireless headphones are universally compatible with iPhone, iPad and Android smartphones. Awei AK7 Bluetooth headset technology has approved IPX4 waterproof, which prevents sweat, rain or water from damaging electrical components that can lead to erosion. CVC 6.0 Smart noise cancellation technology reduces outside noise, microphone, clearer sound when talking to your family or friends; Let you get the high-quality, hands-free shopping mall phone conversation even on the street or indoors Dual battery innovative design, enjoy premium quality playback time of approximately 10 hours (full charge in 2 hours), up to 240 hours of standby time. If connected with iPhone, Bluetooth headphones could display residual electricity in IOS system, it is convenient for you to charge im time. Metal magnetic unit, 6mm strong, ±3dB high sensitivity: 92dB of the horn, super bass, clear HD high frequency, explosive loud music. Bilateral surround cavity structure give double headphone 360° surround stereo sound effect. Food-grade and human-friendly silicone ear tips contour line shark fin ear hook, comfortable and secure, make sure the earphone stays on constantly and keeps your music smooth when you are running, cycling, and exercising doing other activities..PZA MORE SPECS