Color:Silver (512+8GB) Product Features: Main material: shell of the watch: zinc alloy strap of the watch: PU Size (approx.): Product Size: 50.3 * 13.8mm /1.98 * 0.54in Package Size: 105 * 85 * 64mm/ 4.13 * 3.35* 2.52in Weight (approx.): Product Weight (g): 80g Package Weight (g): 100g Display: Display in 1.3 "TFT 360 * 360 touch screen: fully fitted capacitive touch screen Storage: RAM + ROM 2GB + 16GB TF card: without TF card slot Parameters: 1. Main chip: MTK6580 quad-core 1.3ghz Bluetooth 4.0, low power consumption 2. System: For Android 5.1, stand alone equipment, compatible with Android mobile phones (versions above 4.4), for iOS mobile phones (versions of 9.0 or above) 3. Heart rate: real-time heart rate detector mike: support 4. Acceleration sensor: support, pedometer: activate it with gestures speaker: support 5. Camera: support waterproof grade: daily waterproof 6. Gravity sensor: support motor: support Function parameter: 1. Heart rate: support message push: support 2. Pedometer: support SMS service: support 3. Google Market: support calendar: support 4. Google Voice: support alarm clock: support 5. Google Map: support music: support 6. Weather: support call: support 7. Voice Search: support phonebook: support 8. Network: 2G / 3G "2G GSM 850/900/1800/1900,9. 3G WCDMA 850/2100 "SIM card Nano SIM card 10. WI-FI: support GPS: support 11. Battery & Input / output: Capacitance (mAh) Built-in lithium polymer battery, 400mAh (1-2 days for normal use, 2-3 days for stand-by) 12. Connector: charging on the contact Standard packing list: 1. I6 smart watch x 1; 2. Magnetic charging cable x 1; 3. Special screwdriver x 1; 4. Operation manual x 1; 5. SIM card inserting tool x 1.