1. The Watch Works With Android 4.3 Or Higher, IOS 7.0 Or Higher. 2. For Android Phone It Supports All Functions. Scanning the QR Code On Watch Menu to Download The APP "BT Notification". 3. Because Of No APP Available For iPhone, Some Functions Can't Be Used (Anti-lost, Message Sync, Message Notification From Applications, Remote Camera, Bluetooth Music). Other Functions Can Be Used Normally Because No need The APP. 4. The Package Does Not Contain SIM Card Or SD Card. 5. The Watch Is Only Daily Water Resistant, Not For Showering Or Swimming. 6. You Will Need A Valid Micro SIM Card And Micro SD Card Inserted To The Smart Watch In Order To Install Apps Like Browser, Facebook, Twitter and WhatsApp. After That, You Can Click The App And Click Install, And It Will Connect To A Data Network To Get Your Desired App, And Install It To Your MicroSD Card. Specifications: CPU: MTK6261D LCD: 1.54inch TFT High Definition LCD Watch Surface Size: 6.5cm*4cm(L*W) Thickness: 1.4cm The Adjustable Length of Strap: 21cm-26cm Net Weight: 60g Resolution: 240 x 240 pixel Bluetooth: 4.0 Version Camera: 1.3M Battery: 500mAh Polymer Battery Standby Time: >1 Week Without BT Connected And > 3 Days When BT Connected Capacity: Support 32GB The Max Micro SD Card (Not Included with the Product) Language: English, German, French, Italian, Spanish, Greek, Arabic Package Included: 1 x Smart Watch 1 x USB Cable 1 x User Manual