Sweat guard: truly sweat proof technology specially designed to resist the corrosive properties of sweat. Serious Sound: Spirit Proƒ??s dual-EQ feature lets you adjust the intensity of your music, while apt high-fidelity sound enhances music quality. Customized fit: Choose from multiple sizes of ear tips and earwigs to find your perfect fit. Workout for longer: Get up to 10 hours of playtime from a single charge. What you get: sound core Spirit Pro, S/M/L/XL ear tips, S/M/L earwigs, cable clip, shirt clip, Micro USB cable, our worry-free 18-month, and friendly customer service.