Product description NOTES: 1.No GPS tracker, no app, no APN setting, no text function. No WIFI/3/4G. This smart watch only supports 2g GSM. [SIM card IS NOT INCLUDED] If you need to use the watch calling function, you can purchase a 2G SIM card and open voice plan. For ES customers, we recommend that you use SIMYO as a watch SIM card. 2.This kids smart watch supports Micro SIM cards (not included). 3.Make sure the SIM card is activated with Voice. No PIN code. 4.Do not wear the children's watch while swimming, bathing or in hot water, even washing your hands. It is not waterproof. Q: How to copy files and make MP3 work? A: For music, you need to save the .mp3 music to the "My Music" file on the SD card (if you don't save the music you downloaded to the "My Music" file, it can't work). Download a trial music to the "My Music" file. If you have formatted the SD card, create "My Music" files on the SD card; Otherwise, the watch will not recognize the music you downloaded. Q: Is the SIM card of the 2G watch essential? A: No. If you do not want to use the calling function, you can choose not to purchase the watch SIM card. Without SIM card, other functions may work. Such as 7 games, music, camera, correct time setting, recording, calculator, alarm clock. 16 Puzzle Games This children's game watch is equipped with 16 games, which can be used to develop children's brain, train mathematical thinking and hand-eye coordination, and stimulate children's rich creativity and imagination. It is not compatible with downloading other games. Camera Take photos with the camera, capture beautiful moments. Music player You can download the music you want through PC and an SD card that comes with the package. If you format an SD card, create a "My Music" file on the SD card; Otherwise, the watch will not be able to recognize the music you downloaded. Calculator Better studying. A very useful tool to help children calculate and improve learning efficiency. Alarm clock Children's watches support 3 alarm clocks to help children form excellent time management awareness. Silent mode Built-in silent mode when children are at school, they can set silent mode to avoid being disturbed. It can be used as birthday gifts, prizes, awards for outstanding performance, Christmas gifts for children, they will love it very much! Compatible SIM card: SIMYO SIM card View phone screen: 1.54 inch full color touch screen Smart watch battery: 400 MAH polymer battery Phone languages: English, French, Spanish, German, Italian Time format: 12/24h Strap width: 22mm