Specifications:Material: PU Strap + Metal CoverTotal length: 220cmStrap width: 26mmScreen: 1.54 inch IPS capacitive screenCPU Model: 6261DROM: 32MB + 32MBBattery: built-in 380mAh lithium batteryCharging voltage: DC5VCharging interface: micro USB interfaceSIM card: One SIM standard cardTF card: Maximum support 32GBluetooth: Supports 3.0 / 4.0Bluetooth distance: 0-10 metersBluetooth transmission frequency: 2.4GHzBluetooth name: T8Photo format: JPGPhoto resolution: 240 * 240Waterproof Grade:Life WaterproofSpecifications:Dail and answer phone call via your smartwatch: Support Micro SIM cardPedometer, Sleep monitor, Sedentary reminder: Take care of your health, record sports data, monitor sleep, remind you to have a rest.Notes:Please leaving a message before you give the bad feedback, if the products have some problems.Thanks for your understandings.