1. 1.54 inch high sensitive capacitive touch screen; 2. Independent Watch Phone - The watch can be used as an independent phone to make calls and send/reply messages by inserting a SIM card and a sd card, you can take pictures, play music with this watch, very suitable for kids; 3. Fitness Watch - Sleep monitor, Step counter, Calories Counter, Sedentary Reminder, also with Alarm Clock, Calendar, Time/Date, Calculator; 4. Functions for Android Phones - By downloading the APK app on your android phone and built the connection, you can reach functions like bluetooth call/music, Call/Message Notification and camera remote capture on the watch, also support anti-lost; 5. Functions for iPhone - iPhone can't download the app, so functions are limited. iPhone can connect with this watch via bluetooth to make/answer phone calls, play BT music.