Alto Bluetooth Ultimate Stereo Receiver Bluetooth Ultimate is a stereo Bluetooth receiver that streams audio wirelessly to mixers or powered loudspeakers. With Bluetooth Ultimate, you can quickly and easily add stereo Bluetooth to any live sound setupPlug Bluetooth Ultimate into the XLR inputs of a mixer or powered speaker setup, pair your Bluetooth device, and that's it! You can also wirelessly link two Bluetooth Ultimates together* to accommodate larger speaker setups. A built-in, rechargeable battery keeps Bluetooth Ultimate running for over 6 hours. Bluetooth Ultimate is a valuable tool that no audio professional should be without. *This product can wirelessly pair to another Bluetooth Ultimate, or the Alto Professional Bluetooth Total 2, both sold separately. Original Bluetooth Total MK1 is not supported. Additional XLR cable not included. Please note: this is a bluetooth receiver not a transmitter.