SHOKZ OpenRun Pro2 Mini S821 Bone Conduction Fitness Exercise Marathon Earphones
OpenRun Pro 2 Earphones × 1. - OpenRun Pro 2 Carrying Case × 1. - Type: Hybrid air conduction and bone conduction speaker. - Model: Mini S821. - Air conduction: 96dB ±2.5dB. - Bone conduction: 101.3dB ±3dB.