June 2021

I believe everyone’s mobile phone has Bluetooth and WiFi keys. As we all know, it’s a wireless connection. Bluetooth will probably be used when connecting speakers, but now WiFi speakers appear. What is the difference between Bluetooth and WiFi then? Maybe some people are beginning to be...

Due to the long body length, the school bus and buses usually carry a lot of passengers and are noisy. When passengers need to communicate with the driver, it is particularly difficult, especially for passengers away from the driving seat. If you need to go to the front row to communicate with the driver...