Passkey Entry: This method might be used in between a device with a display and also a device with numeric keypad entry (such as a keyboard), or two devices with numeric keypad entry. Legacy pairing: Here is the only method available in Bluetooth v2.0 and before. Each device should https://www.bluetoothspeaker.top/bass-loud-inalambrico-home-theatre-system-5-0-bt-gaming-bluetooth-speaker/