This FAQ answers How to turn on the battery – CoolStream Duo Bluetooth Music Receiver. To turn the CoolStream Duo Bluetooth Music Receiver’s battery on, slide the top button to the left. To turn off the battery slide the button to the right. The button can be in either position in order to charge the CoolStream Duo. All … Continue reading “How to turn on the battery – CoolStream Duo Bluetooth Music Receiver?”