Bluetooth 5.4 connection No longer need to use cables to connect to speakers. The Bluetooth receiver from MICROWARE uses a Bluetooth 5.4 connection to receive and transmit audio signals from your smartphone or device to your speakers. You can also listen to music wirelessly with HiFi quality. Wide Range 15 M There is no need to move so that the Bluetooth receiver can catch the signal from your device. The Bluetooth 5.4 connection used has a transmission distance of up to 15 M with a stable connection to allow you to play music remotely.