Oppo-Smartphone can connect to other devices via Bluetooth to transmit (send and receive) data.

The Oppo-Smartphone has Bluetooth enabled by default, but if it is rarely used, it is recommended to disable Bluetooth to save battery power.

Android 10 | ColorOS 7.0
Step 1:  Open the  Settings
Step 2:  Tap on  Bluetooth
Step 3:  Enable or Disable  Bluetooth
  1. Open the Settings
  2. Tap on Bluetooth
  3. Enable or Disable Bluetooth

Oppo Instructions