SHOKZ OpenRun Bone Conduction Open-Ear Endurance Headphones - Red Size:Standard 8 upper and 52 lower

8 upper and 52 lower

All this while increasing to 12-gears

Combination 11-13-15-18-21-24-28-34-40*-48*

LED Light Reminding

SHOKZ OpenRun Bone Conduction Open-Ear Endurance Headphones - Red Size:Standard 8 upper and 52 lowerOPENRUN(AEROPEX WITH QUICK CHARGE) BONE CONDUCTION OPEN EAR ENDURANCE HEADPHONES Our top selling wireless sport headphones formerly known as Aeropex now come with new packaging, a quick charge feature, and a new name. OpenRun is our lightest headphones to date and are engineered with outstanding sound, a long lasting battery, and Quick Charge to keep you aware and motivated while you power through any workout. 8th Generation Bone Conduction Technology