cheapest smart watch bracelet wrist watch sim card                       

1,Bluetooth version: 3
2,operating frequency: 2.4GHz
3,the effective distance of 5-10M
4,charging time: 2 hours
5,automatic power saving mode
6,ultra low function and easy operation
7,security authentication, data encryption
8,support Chinese traditional; Chinese simplified; English; Korean; Russian; Spanish; French; German language; Italian; Portuguese; Arabic and other languages with 9,colors: black, white, gold, red