For more information,pls check out our introductory video in Youtube.com:https://youtu.be/piVRMGP0w2w Specifications: -Case Material:Stainless Steel -Case Diameter:40 mm -Case Thickness:10 mm -Dial Window Material:Sapphire Glass -Dial Color:White -Display Type:Analog -Band Material:Kraft first layer -Band Width:20 mm -Band Length:225 mm -Clasp:Buckle -Bluetooth Chip:Dialog SmartBond DA14580(the world’s smallest and the lowest power bluetooth chip which is produced by Dialog Semiconductor (UK) LTD) -Bluetooth Version:Bluetooth 4.0 -Compatibility:Support Android 4.3/iOs 7.0/above -Sensor:ADI Three Axis Accelerometer(Analog Devices Inc(ADI) is a well-known international consumer electronics makers,NASDAQ is ADI.) -Movement:Citizen Miyota(From the world’s biggest manufacturer of watch movements) -Water-resistant Grade: 3 ATM -Endurance:Movement 5 years+ (as a normal watch), Button Battery 6 months+ (smart functions applied),Both are easy to source and replace when the time comes. -Other Features:Pedometer,Incoming Call Remind,Alarm Clock Remind. Instructions: 1. Scan the QR code in the manual, download and install the APP. 2. Open the APP, Follow its hints, Bind your paick watch. Remember to keep your watch around your phone and open the Bluetooth. 3. When the light on the dial flashes, just click the dial to finish the binding;then you can set up your private information and requirement in the system. 4. If you need to replace the battery, please follow the instructions in the manual by using the screwdriver attached. Package include: -1 x JoyGeek Paick Smartwatch -2 x CR2032 Button Battery -1 x Replacement tool kit -1 x User Manual Warranty: -JoyGeek is a registered trademark in the USPTO,and it also approved by Amazon Brand Registry.