TDK Life on Record A33 Wireless Weatherproof Bluetooth Speaker (Certified Refurbished) Bluetooth support for wireless connection to Bluetooth-enabled devices. Use for phone calls with built-in microphone. Weatherized chassis protects speaker from dust, water, and harsh weather Wireless speaker ideal for outdoor music listening Rechargeable battery provides up to six hours of portable playback Trouble shooting steps: It is possible that the battery on A33 is so low that you cant charge it using the AC adapter. Try unplugging the AC adapter and and unplug the DC plug from the A33. Then slide the power switch on the right side of the speakers to off and let it sit for 10-15 seconds. Slide the power switch back on and connect the AC adapter again and charge it for 45 minutes. The power button on top of the speakers should glow red during this time indicating that it is charging. Press the Bluetooth button on top of the speakers to enter Bluetooth mode. Press and hold the Bluetooth button for 3-4 seconds until the Bluetooth light starts blinking rapidly. This will make the phone ready to connect to the speaker. On your device, enable Bluetooth in the settings menu and select A33 from the device list. If your device ask for the passkey, use 0000. In order to know if the device is paired successfully, the speaker will beep and the Bluetooth light will be solid blue. If it failed, the Bluetooth light will blink slowly.