Why won't my LENRUE F21 speaker turn off, and why does it make a pairing noise every 10 seconds even when not paired?

It appears your LENRUE F21 speaker has entered a frozen or glitched state. According to the manual's troubleshooting section, you should perform a factory reset to resolve unresponsiveness.Perform a Factory Reset: Press and hold the Power button (Circle icon) for at least 10 seconds. This should force the device to restart and clear the glitch.Check for TWS Mode: The repetitive noise every 10 seconds might be the speaker searching for a second unit to pair with (True Wireless Stereo). Ensure you haven't accidentally double-clicked the Power button, which initiates TWS pairing.Disconnect Devices: Long press the Play/Pause (Triangle icon) button to force the speaker to disconnect from any current Bluetooth devices, then try pairing it again from scratch.If the speaker remains stuck and will not turn off even after holding the button for 10 seconds, allow the battery to drain completely until the unit shuts down on its own, then recharge it fully (3-4 hours) before attempting to power it back on.

LENRUE F21 Wireless Bluetooth Speaker Instruction Manual

Introducció

Thank you for choosing the LENRUE F21 Wireless Bluetooth Speaker. This portable, waterproof speaker is designed to deliver high-fidelity stereo sound with dynamic LED lighting, making it ideal for various indoor and outdoor activities. Please read this manual carefully to ensure proper use and to maximize your enjoyment of the product.

Image: The LENRUE F21 Wireless Bluetooth Speaker, showcasing el seu elegant disseny negre.

Producte acabatview

Contingut del paquet

1 x F21 Bluetooth Speaker
1 x cable de càrrega USB-C
1 cable AUX de 3.5 mm
1 x Manual d'usuari

Controls i Ports

Imatge: Un primer pla view of the LENRUE F21 speaker's control panel, showing the buttons.

Botó	Funció	Operació detallada
O (Cercle)	Power On/Off, Switch Play Mode, TWS Connection/Disconnect	Long press for On/Off. Short press to switch play mode. Double click for TWS connection/disconnection.
▶ (Triangle)	Play/Pause Music, Call Back, Disconnect Devices	Short press for Play/Pause. Double click for Call Back. Long press to disconnect devices.
+	Volume Up, Next Track	Prem curt per pujar el volum. Prem llarg per a la pista següent.
-	Volume Down, Previous Track	Prem curt per baixar el volum. Prem llarg per a la pista anterior.
☀ (Dg)	RGB Light On/Off, Change Light Mode	Long press for RGB Light On/Off. Short press to change light display mode.

Image: A close-up of the speaker's rubber-sealed input ports, including AUX, USB-C, and TF card slot.

Port d'entrada AUX: For wired audio connection using the 3.5mm AUX cable.
DC 5V (USB-C) Charging Port: Per carregar l'altaveu.
Ranura per a targetes TF: For playing audio directly from a TF (Micro SD) card (supports up to 32GB, MP3/WAV format).

Configuració

Carregant l'altaveu

Connect the provided USB-C charging cable to the speaker's DC 5V port and a compatible USB power adapter (not included).
The battery indicator light will glow red while charging.
When fully charged, the indicator light will turn off.
Normalment, una càrrega completa triga entre 3 i 4 hores.

Encès/Apagat

Per encendre: Premeu llargament el botó O (Circle) button for approximately 2 seconds until you hear a power-on prompt and the LED lights activate.
Per apagar: Premeu llargament el botó O (Circle) button for approximately 2 seconds until you hear a power-off prompt and the LED lights turn off.

Instruccions de funcionament

Emparellament Bluetooth

Ensure the speaker is powered on and in Bluetooth pairing mode (indicated by a flashing blue light).
Al dispositiu mòbil, activeu el Bluetooth i cerqueu els dispositius disponibles.
Select "F21" from the list of devices to connect.
Once connected, you will hear a confirmation sound, and the blue indicator light will become solid.
L'abast sense fil és d'aproximadament 10 metres (33 peus).

Vinculació True Wireless Stereo (TWS).

The F21 speaker supports TWS functionality, allowing two F21 speakers to connect wirelessly for enhanced stereo sound.

Two LENRUE F21 Speakers in True Wireless Stereo Pairing

Image: Two LENRUE F21 speakers wirelessly connected, illustrating the True Wireless Stereo feature.

Turn on both F21 speakers.
Disconnect any previously paired devices from both speakers.
Feu doble clic a O (Circle) button on one of the speakers to enter TWS pairing mode.
You will hear a "Beep" sound once pairing is finished.
Connect your device to the F21 speaker via Bluetooth. Both speakers will now play audio simultaneously.

Reproducció de música

Reproduir/pausa: Premeu breument ▶ (Triangle) button.
Pujar el volum: Premeu breument + botó.
Baixar el volum: Premeu breument - botó.
Pista següent: Premeu llargament el botó + botó.
Pista anterior: Premeu llargament el botó - botó.

Control de llum LED

Activar/Desactivar: Premeu llargament el botó ☀ (Sun) button.
Canvia el mode: Premeu breument ☀ (Sun) button to cycle through different light display modes.

Manteniment

Keep the speaker away from extreme temperatures and direct sunlight.
Netegeu l'altaveu amb un suau, damp tela. No utilitzeu productes químics o materials abrasius.
Ensure the rubber flap covering the ports is securely closed when using the speaker near water to maintain its IPX6 waterproof rating.
Guardeu l'altaveu en un lloc fresc i sec quan no l'utilitzeu.

Resolució de problemes

Problema	Solució
L'altaveu no s'encén.	Ensure the speaker is fully charged. Long press the power button to turn it on.
No s'ha pogut emparellar per Bluetooth.	Make sure the speaker is in pairing mode (flashing blue light). Disconnect the speaker from any other devices. Turn off and on your device's Bluetooth.
Sense so o amb un volum baix.	Comproveu els nivells de volum tant de l'altaveu com del dispositiu connectat. Assegureu-vos que l'altaveu estigui correctament emparellat.
Speaker freezes or becomes unresponsive.	Press and hold the power button for 10 seconds to perform a factory reset.
L'emparellament TWS falla.	Ensure both speakers are F21 models and are not connected to any other devices. Follow the TWS pairing steps carefully.

Especificacions

Característica	Detall
Nom del model	F21
Marca	LENRUE
Tecnologia de connectivitat	Bluetooth 5.0
Tipus d'altaveu	Altaveu de gamma completa
Potència de sortida màxima dels altaveus	8 Watts (Dual 8W speakers for 16W total)
Mode de sortida d'àudio	estèreo
Capacitat de la bateria	2000mAh (1 Lithium Ion battery included)
Hora de joc	Up to 24 hours (with lights off, 50% volume)
Temps de càrrega	3-4 hores
abast sense fils	10 metres (33 peus)
Nivell de resistència a l'aigua	IPX6 impermeable
Dimensions del producte	3.1 "P x 3.1" W x 7.1" H
Pes de l'article	1.3 lliures
Entrada Voltage	5 volts (CC)
Característiques especials	Stereo Pairing (TWS), Type-C Port, Waterproof, RGB LED Light

Garantia i assistència al client

LENRUE is committed to providing high-quality products and excellent customer service.

30-Day Refund: If you are not satisfied with your purchase, you may be eligible for a full refund within 30 days.
180-Day Worry-Free Warranty: The product comes with a 180-day warranty covering manufacturing defects.
Suport tècnic de tota la vida: LENRUE offers lifetime technical support for the F21 speaker. For any inquiries or assistance, please contact our customer service team.