FunctionsMusic Player, 7 Games, Call, 3 Alarm Clock, Calculator, Camera, Photo album
SIM CardYou need to purchase a 2g Micro sim card, recommend Speedtalk for US.
Download Music: Connecting watch with computer, you can save the mp3 music in the watch SD Card file ""My Music".
Easy-to-operate: Dont need to download app, dont need to connect cell phone, all the functions are built-in the watch, very easy to operate for kids
Without SIM card: It still can be used as a normal kids' watch without sim card, all the functions (except calling) still can be used normally.