Q : Can I still control it with my phone without WiFi? Does it use Bluetooth?

A:  No, it does not use Bluetooth for control. The method for operation without a WiFi network is:
1.Use a second phone to create a mobile hotspot.
2.Connect both your primary control phone (with WiFi and Bluetooth enabled) and the charger to this hotspot.
3.Once connected, you can remotely control the charger using your primary phone.
4.(Optional) You can turn off the hotspot after the initial setup.
5.The effective control range is approximately 10 meters, limited by the Bluetooth connection stability.