A DealNews exclusive! Vi Trainer offers its Vi Sense Premium Heart Rate Sensing Headphones for $149. Coupon code "DN25" drops it to $111.75. With free shipping, that's the lowest price we could find by $28. These AI-enabled earphones feature: Audio by Harman/Kardon heart rate sensor virtual cardio coaching with voice commands up to eight hours of run time 12 month subscription to the Vi Trainer App for iOS and Android