Yes, wireless microphones can connect to outdoor speakers. Generally speaking, the mobile phone wireless microphone will be connected to the phone through Bluetooth or Wi-Fi technology, and outdoor speakers usually support Bluetooth or Wi-Fi connection. Therefore, you only need to ensure that the microphone and the speaker are turned on the corresponding connection function, and match and pair, you can transmit the sound of the microphone to the outdoor speaker through wireless.
Of course, it can be used by pairing the wireless signal emitted by the wireless microphone with the outdoor speaker