Color: Complete Machine Silvery + Silvery Steel Strap + White Silicone Strap + Pink Silicone Strap Operating System Version: Android&ios Strap Material: Silicone Body Material: Zinc Alloy Activity Type: Exercise & fitness Communication & Utility Features: Phone Call Compatible ...Color: Complete Machine Silvery + Silvery Steel Strap + White Silicone Strap + Pink Silicone Strap Operating System Version: Android&ios Strap Material: Silicone Body Material: Zinc Alloy Activity Type: Exercise & fitness Communication & Utility Features: Phone Call Compatible Operating System: Android 4.4 Operating Voltage: ≤36V Power Mode: USB Wireless Property: wireless Battery Properties: Rechargeable Battery Rechargeable Battery: Lithium Battery-Polymer Brand Electronics,Smart Devices,Clips, Arm & Wristbands Complete Machine Golden + Golden Steel Strap + Pink Silicone Strap + Wine Red Silicone Strap,Complete Machine Silvery + Silvery Steel Strap + White Silicone Strap + Pink Silicone Strap