1. Introducció
This manual provides detailed instructions for the G Keni Smart Brake Sensing Rear Bike Light, Model Q5. Designed for enhanced cycling safety, this ultra-bright LED taillight features smart brake sensing, auto light sensing, and a durable aluminum alloy shell with IPX6 waterproofing. Please read this manual thoroughly before use to ensure proper operation and maintenance.
2. Característiques del producte
- Detecció intel·ligent de frens: Automatically switches to high brightness for 5 seconds upon braking, alerting rear riders.
- Quatre modes de llum: Normal Flash, Breathing Flash, Fast Flash, and Steady On modes for various riding conditions.
- Auto Light Sensing: Automatically turns on in darkness and off in daylight (applicable to Normal Flash and Breathing Flash modes).
- Detecció de moviment: Auto-off after 30 seconds of no motion, and auto-on when motion is detected.
- Brillantor ajustable: Max 120 Lumen, adjustable in Steady On mode by long-pressing the button.
- Llarga vida útil de la bateria: Built-in 400mAh Li-ion battery, offering up to 50 hours of runtime depending on settings.
- Construcció duradora: Aluminum alloy shell with IPX6 waterproof and dustproof rating.
- USB recarregable: Convenient charging via USB port.

Figura 2.1: Característiques clauview
3. Contingut del paquet
Si us plau, verifiqueu que tots els elements siguin presents al vostre paquet:
- G Keni Smart Brake Sensing Rear Bike Light (1 unit)
- Metal Mounting Bracket (for saddle mounting)
- Adjustable Silicone Strap (for seat post mounting)
- Cable de càrrega USB
- Manual d'usuari (aquest document)
4. Configuració
4.1 Càrrega de la bateria
Before first use, fully charge the bike light. The device features a built-in 400mAh Li-ion battery.
- Locate the USB charging port on the light.
- Connect the provided USB charging cable to the light and to a standard USB power source (e.g., computer USB port, wall adapter).
- The four blue indicator lights will show charging progress, each representing 25% capacity. All four lights will be solid when fully charged.

Figure 4.1: USB Charging Port Location
4.2 Muntatge de la llum
The G Keni bike light offers two primary mounting options:
- Under the Saddle (with Metal Mounting Bracket):
- Attach the metal bracket to the saddle rails using the provided hardware.
- Slide the bike light onto the bracket until it securely clicks into place.
- To the Seat Post (with Adjustable Silicone Strap):
- Secure the silicone strap mount to your bike's seat post.
- Attach the bike light to the silicone strap mount. Ensure it is firmly attached and facing rearward.

Figura 4.2: Opcions de muntatge
5. Instruccions de funcionament
5.1 Encès/Apagat
Press and hold the power button located on the light to turn it on or off.
5.2 Canvi dels modes de llum
Once powered on, short press the power button to cycle through the four available light modes:
- Normal Flash Mode
- Breathing Flash Mode
- Mode de flaix ràpid
- Steady On Mode

Figure 5.1: Light Modes and Battery Life
5.3 Funcions intel·ligents
- Detecció de frens: The light automatically brightens to ultra-bright mode for 5 seconds when braking is detected.
- Light Sensing (Auto ON/OFF): In Normal Flash and Breathing Flash modes, the light will automatically turn off in bright conditions (daylight) and turn on in dark conditions. If you require the taillight to remain on during daytime, select Fast Flash or Steady On mode.
- Motion Sensing (Auto ON/OFF): The light will automatically turn off after 30 seconds of no motion. It will automatically turn back on when motion is detected.
- Adjusting Brightness (Steady On Mode): While in Steady On mode, long press the power button to adjust the brightness level.

Figure 5.2: Smart Sensing Functions
6. Manteniment
- Neteja: Netegeu la llum amb un suau, damp tela. No utilitzeu netejadors abrasius ni dissolvents.
- Càrrega: Recharge the battery regularly, especially if the light will not be used for an extended period, to maintain battery health.
- Emmagatzematge: Guardeu la llum en un lloc fresc i sec quan no s'utilitzi.
- Resistència a l'aigua: While IPX6 waterproof, avoid prolonged submersion in water. Ensure the USB port cover is securely closed to maintain water resistance.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| La llum no s’encén. | La bateria està esgotada. | Carregueu la llum amb el cable USB proporcionat. |
| La llum s'apaga de manera inesperada. | Motion sensor activated auto-off. | Move the bike or tap the light to reactivate. |
| Light does not turn on in daylight. | Light sensing feature is active (Normal Flash/Breathing Flash modes). | Switch to Fast Flash or Steady On mode if daytime visibility is desired. |
| Brake sensing not working. | Llum no ben muntada o sensor obstruït. | Ensure light is firmly mounted and sensor area is clear. |
8. Especificacions
| Atribut | Detall |
|---|---|
| Marca | G Keni |
| Nom del model | Q5 |
| Color | Vermell |
| Material | Alumini, plàstic |
| Font d'alimentació | Funciona amb bateria |
| Capacitat de la bateria | Ió de liti de 400 mAh (integrada) |
| Nivell de resistència a l'aigua | IPX6 |
| Pes de l'article | 3 unces |
| Dimensions del producte | 1.57 cm de llargada x 1.34 cm d'amplada x 1.34 cm d'alçada |
| Nombre de configuracions | 4 modes de llum |
| Brillantor | Max 120 Lumen |
| Tipus de muntatge | Seat Mount (Saddle or Seat Post) |
9. Garantia i Suport
G Keni provides a 12 mesos de garantia for this product from the date of purchase. We also offer a Garantia de devolució de 30 dies. For any questions, concerns, or support needs, please contact our customer service team, available 24/7. Your satisfaction is our priority.
Contact information for support can typically be found on the product packaging or the official G Keni weblloc.





