Here is a pair of earbuds optimized for cross-training. The Jabra Sport Coach Wireless Earbuds provide you with high-quality audio experience and use an integrated motion sensor to monitor your activity. The earbuds are lightweight and compact. They are sweat and weather proof.
The companion app lets you choose from more than 40 exercises. You are provides with real-time audio coaching to say on the right track. A pair sets you back under $150.