Before Pairing please Ensure battery is charged on both devices

Keep the device within 1 mtr range while making BT connection

Make Sure LED is blinking blue (which shows pairing mode)

While pressing "+" & "-" key together, make sure there is a default sound of BT Mode

Remove each of the speakers name from any input device's (Mobile/Laptop) Bluetooth Settings before making BT Connection

Make sure none of the speaker is in any other music mode except BT Mode