Wire-Free, Mess-Free Spacer by Just Corseca. Total Freedom. Free yourself from the ordinary with the drop-dead gorgeous Spacer JST400 from Just Corseca. Just Corseca Acoustic Engineering: JLAD chipset with high fidelity audio driver makes your listening experience more intimate, personal, and real by fine-tuning to allow for a more natural playback. Low Frequencies are subtly strengthened giving a crystal-clear sound output. Up to 15 Hours of Playtime on a Single Charge Smart PCB design and a big 200 mAh smart battery deliver an unmatched 15 hours of playtime on a single charge of the charging case. Which means a whole week on a charge! Low Energy Operation Enjoy the advantages of Low Energy Operation PCB architecture which means reduced power usage, longer battery life, and improved communication speeds. To fully harness the power of Bluetooth V5.0.Sweat-proof Buds your ears will thank you for! Smart Soft Touch Control: No more struggling with clumsy buttons you can’t see or reach. With JLAD6976D chipset for smooth pairing with Bluetooth devices. It’s not about the size it’s about Quality. Design in Finland.