Jabra SPORT COACH (Yellow) Wireless Bluetooth Earbuds for Cross-Training - Retail Packaging Integrated cross training app for personalized workout planning and in-ear coaching, Choose from more than 50 exercises, from beginner to advanced. If you combine cross training with running, the Track Fit motion sensor will measure distance, pace, steps, cadence and calories burned. Refer to the user manual and technical Specification sheet before use. Premium wireless music powered by Dolby - motivating music, free from wires and cables Sweat and weather proof, built toward US military standard for rain, shock, sand and dust protection (IP55 Rated) Perfect and secure fit, will neither hurt or fall out. Multiple sized ear gels and ear wings to choose from to create a personalized fit.