With outstanding design and volume control function, Oraimo Collier Shark 4 OEB-E30D delivers high quality crystal clear sound for bass. The headphones are equipped with Bluetooth version, V5.0 and easily connect with any smart device. The impressive battery capacity allows you to play music for up to 12 hours continuously, satisfying the needs of music lovers, delivering crisper sound quality . Extremely comfortable design won't strain your ear and allows you to have a long talk in one go and have up to 300 hours of standby time. A four-button remoteand a high-quality microphone on the neckband make it easy to stay connected and in control of your music. A soft, lightweight neckband conforms to your body for all-day wearability. Ergonomic ear tips with custom attachments ensure a perfect fit .