How do I charge the speaker?
Connect the included AC/DC power adapter to the DC power input, then plug it into a standard wall outlet. A red LED indicates charging, and it will turn off when fully charged. Charge time is about 4.5–5 hours.
How long does the battery last?
Up to 6 hours at 50% volume.
How do I pair my device via Bluetooth?
The speaker enters Bluetooth mode automatically when powered on. On your device, search for “ISB653” in Bluetooth settings and select it. A voice prompt will confirm connection.
What if my device won’t reconnect?
Press and hold the Play/Pause/Pair button to re-enter pairing mode. The speaker will say “Bluetooth is connecting.”
Will it auto-connect to the last device?
Yes, it will reconnect automatically when powered on.
What audio sources are supported?
Bluetooth, Aux-in (3.5mm), USB drives (up to 64GB), and MicroSD cards (up to 64GB).
How do I use Aux-in mode?
Connect a 3.5mm audio cable from your device to the Aux-in jack. The speaker will auto-switch to Aux mode. If not, press the Mode button.
How do I play music from a USB or MicroSD card?
Insert your USB drive or MicroSD card into the port/slot. The speaker will automatically switch to that mode. Use the speaker controls to navigate tracks.
Can I use a microphone with this speaker?
Yes. Plug into one of the two Microphone Inputs. Adjust using the Mic Volume knob.
Can I record with the microphone?
Yes. Insert a USB drive or MicroSD card first. Hold the Mic Record button to start recording and press it once to stop. The recording saves to the storage device.
Any tips for best mic use?
Lower the mic volume before plugging/unplugging. Keep the mic at a distance from the speaker to prevent feedback.
What is Party Plus mode?
Party Plus allows you to pair two ISB653 speakers wirelessly for double sound. Press and hold the Next button for 5 seconds until you hear a chime. After pairing, connect your Bluetooth device.
How do I turn lights on/off or change effects?
Hold the Lights button to turn LEDs on/off. Press the button to cycle through 6 light effect modes.
Can I adjust EQ?
Yes, use the EQ Adjust button to fine-tune sound.
How do I turn voice prompts on/off?
Hold the Previous button for about 10 seconds.
Bluetooth keeps cutting out. Any tips?
Keep your device within range (approx. 30 ft) and away from interference.