Power:Button battery; Heart rate sensor type:Chest strap; Illumination:NO; Water-resistance (m):30m; Gender:Unisex; Activity:Multisport,Cycling,Indoor Exercise,Outdoor Exercise,Walking,Running; Function:OS Compatibility,Heart Rate Target Zone(s),Average Heart Rate,Wireless Communication; Color:Black; Dimensions / LxWxH (cm):5.53.5; Net Weight (kg):0.08