1. Check Compatibility Before Purchase: We you to verify the compatibility of the 4G CPE router with local frequencies before purchase. You can check this at : Please contact customer service about download or installation information before placing order. 2. Local Country Frequency Bands: It's crucial to understand which frequency bands are used in your country if you use 4G WIFI router. To ascertain this information, please refer to: Please contact customer service about download or installation information before placing order. 3. Local Carrier Frequency Bands: Ensuring wireless modem compatibility with your local carrier's frequency bands is another important step. For more details, you can visit: Please contact customer service about download or installation information before placing order. 4.Color Variation: Depending on the lighting and the way the list is viewed, colors of wireless internet router slightly, It does not affect the use of. We thank you for your understanding