Get Fitted & Comfortable: The ergonomically designed ear fin keeps the lightweight earphones in place while 4 sizes of ear tips (XS, S, M, L) provide a customized fit and longtime comfortable wear. The cable clip ensures no wires get tangled. IPX7 Waterproof: With IPX7 waterproof rating, nano-coating technology efficiently prevents rainwater and sweat from penetrating and damaging wireless headphones' sensitive components, keeps going in all weathers and through all workouts. Long-Lasting Battery: Powerful rechargeable battery holds up to 16 hours of continuous wireless listening or 250 hours of standby time with just 2 hours of charging. Vrifoz bluetooth earbuds are enough to get you through any commute or workout. Crisp Voice Calls: Built-in microphone with advanced CVC 6.0 noise cancellation technology effectively blocks out external noise, allowing you to take clear hands-free calls while driving or traveling. Button control on the right wireless earbuds is easy to adjust the volume, skip tracks, answer or end calls, etc. High-quality Stereo Sound: Our Bluetooth headphones with upgraded dynamic drivers and CSR chips, focus on bringing high fidelity sound and rich, powerful bass to your ears; Bluetooth 5.3 technology allows for quicker pairing and more stable connections, ensuring more stable calls and perfectly synchronized audio and video.