Model: FD68S Color: Black, Red, Navy Blue, , Green (optional) Waterproof: Life waterproof BT Version: 5.0 Screen Size: 1.44inch Applicable System: Above IOS 9.0 , Above Andriod 5.1 Watch Band Material: TPU Watchcase Material: Alloy Metal Lastics Screen Resolution Ratio: 240 * 240pixel Way: Built-In USB Interport Operation Way: Press To Control Chip: HS6620D Frequency Band: 2.4GHz Standby Time: About 10 Days Package Weight: 44g Package Size: 122 * 81 * 32mm Specifications: 1.Multi-fuction sport smartwatch: Built-in multiple sports modes, alarm clock, step counting and other practical functions. 2.Environmental protection TPU strap: High toughness, skin-friendly, comfortable to wear. 3.BT connection: Stable without wires, convenient and fast. 4.Wrist optical heart rate: Raise your hand to light up, monitor heart rate changes in real time. 5.Built-in USB interface: Plug and play, universal, practical, convenient and fast. 6.Widly Compatible: Compatible with Android and iOS systems, smart sports. Package Included: 1 * Smart Watch