There are no particular issues with usage. The included accessories are the ear tips. ---- ・High-quality dual drivers: Knowles BA + 8.6mm dynamic driver for CD-quality clear sound. ・Cinema-like sound experience: Proprietary Crossover technology for balanced reproduction of high, mid, and low frequencies. ・Low latency & stable communication: QCC3040 chip with aptX Adaptive support for comfortable listening. ・Long playback time: Up to 40 hours of playback, wireless charging compatible. Can be used for 10 hours on a single charge. ・High-quality calls: cVc 8.0 compatible microphone for clear voice calls.