IQI MervinTech Round Smart Watch Phone I2 Android 5.1 MTK6580 Built-in SIM Card Slot Compatible for Android and iPhone or Independent Use 3G GPS WiFi Google Functions (Black / Black Strap) Compatible with Android phones - You can use this with most Android smartphones and tablets with OS 2.3.3 or later 1.33" TFT capacitance screen - See information in clear, easy-to-read detail with 360 x 360 pixels of resolution 450mAh Rechargeable Battery - Lithium-ion polymer battery can be charged with the included USB cable Notifications - Keep up to date with caller ID, SMS, e-mails, social media posts, fitness stats, news and sports headlines and other alerts that your compatible smartphone supports Customize vibration patterns - You'll know what kind of incoming alert you're getting without even needing to look at your watch.