* each sizes have four colors: black, blue, orange, green
* compatible for the following models:
Fitbit : flex /flex2/one/alta/alta HR /charge2/charge3/inspire
Xiaomi：Mi1A/1S/Mi2/Mi3/Mi4 /hey+
Samsung：galaxy fit e SM-R375 / galaxy fit SM-R370
Huawei：band 3E/ 4running /Honor Band 4/ Honor Band 3
Garmin：Vivofit JR/ Vivofit JR2/ Vivofit3
