Pure Bass via 40mm Dynamic Drivers: Specially designed to provide top-quality, detailed sound with pure bass. soundcore H30i on-ear wireless headphones use BassUp technology to offer a listening experience you can feel. Extended Playtime: Enjoy 70 hours* of constant playtime on a single charge. Perfect for the on-the-go listener. *Battery playtime is obtained from testing in the soundcore laboratory in continuous audio playback at 50% volume. The actual playtime may vary by volume, audio source, environmental interference, usage, etc. Fast Charging: Top up your power with lightning-fast charging. A quick 5-minute charge provides an impressive 4 hours of playtime.