Marshall minor II Bluetooth is a hard-working wireless in-ear with Bluetooth Qualcomm apt technology. It offers 12 hours of wireless playtime on a single charge and boasts an innovative ear-fit system with an adjustable loop for an optimized and ergonomic fit. They are engineered to stay in place and feel comfortable throughout the day. Minor II Bluetooth features custom-tuned 14. 2mm dynamic drivers that produce rich highs, crisp midst and clear, balanced bass that will make you feel like you're center stage, the in-ear design provides just the right amount of noise isolation, while still allowing you to hear your surroundings.