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K 1595
Seatpost > StVZO

The light of S311 is powered by a built in, non-removable, rechargeable battery.

Features +

선택된 옵션

Product Details
  • Features

    Patented seatpost with an integrated seat rail clamp. The seatpost tube features 5 holes in which the LEDs are enclosed. The USB 2.0 charging port is located in the lower section of the seat rail clamp. The port is accessible from the outside and can be closed using a transparent silicone cover.


    25.4 / 27.2 / 30.6 / 30.8 / 30.9 / 31.6


    350 / 400(30.6, 31.6)

    Color and surface finish

    Polished Silver, Matt Black

    Seatpost Type

    2 bolt clamp, offset 9, mechanical stop

    Seatpost material

    Aluminum 6061 T6 

  • Light unit

    5 LEDs with integrated electrical light control and battery management system. The two upper LEDs are protruding, also ensuring the lateral emission of light. The lower 3 LEDs are sunken into the seat post tube. The LEDs, circuit board and battery are enclosed in a plastic housing and are thus protected (dust and splash proof in accordance with IPX5).

    There are 2 modes to choose from:

    - 5 LED mode (all 5 LEDs light up)

    - 3 LED mode / energy saving mode (only the top 3 LEDs light up)


    Light Module

    2 wide angle red LEDs, 3 high brightness red LEDs



    Power Source

    Lithium-polymer battery 3.7V, 800mAh, 801473 with protection

    Light Duration

    (fully charged battery)

    5 LED: 10 hours

    3 LED: 15 hours

    Charging Time


  • ETC



    Seatpost test standard

    ISO 4210 City, Mountain

    Compliant with

    standard or directive

    RoHS, UN3481, StVZO §22a TA Nr.23 (Rear lights for bicycles), IPX5

    Package Contents

    Rear light seatpost

    USB charge cable (200cm)

How to Use
  • Assembly

    Use the correct diameter corresponding to your bicycle frame.

    Use the appropriate tool to fasten the saddle support.

    Adhere to the safety lines of the minimum and maximum insertion heights.

    The rear light may only be operated in the following angular range: Max 76˚, Min 70˚.

    The lower two LEDs may be sunk in the frame. Always pay attention to the mechanical stopper of the maximum insertion depth!

    The rear light must be mounted in such a way that it is illuminated at the rear. The reference axis (see drawing) must be aligned parallel to the bicycle‘s longitudinal axis.
    The two lower LEDs may be inserted into the frame. The minimum insertion length into the frame is 100mm. The rear light must be aligned so that it shines backward. A mechanical stopper prevents the insertion of the seatpost to cover the 3rd LED(from the bottom) and damage to the two top protruding LEDs.

    Angle limits (Frame seat tube)

    Min: 70.0°

    Max: 76.0°

  • Function

    The second top LED functions as a button and is used to operate the rear light.

    Light modes

    Off 5 LEDs 3 LEDs Long press to switch off

  • Charge state

    Low battery alert

    Indicated by a blue LED integrated into the micro-USB port. As soon as this LED lights up, the battery still has enough capacity to power the LEDs for 1 more hour in accordance with the regulation. The micro-USB port is covered with a transparent silicone cap so that the blue LED is visible.


    Micro-USB 2.0 port integrated in the seat rail clamp with a transparent silicone cover for splash-water protection.

    Charging voltage: 5V

    Charging current: 0.5A 2.0A

    In order to reach the full load capacity, it takes about 2.5 hours. During charging, the first led flashes in RED. The flashing stops, changes to continuous red light on when the battery is completely charged. When the battery is fully charged, remove the cable from the USB port. Should the product become excessively hot during charging, stop the charging process. Never charge the battery when the USB port is wet. Full charge and discharge cycles 500.

    Charging time

    2.5 hours

  • Precautions

    At startup, the product must be dry. Remove any moisture before riding.

    After installation, test that the seatpost does not drop under load.

    Take care that the LEDs are not covered by a bag or clothing when riding.

    Do not make any independent changes to the product. Do not try to open the product.

    The product contains one lithium-polymer battery.

    Steps to take in the event of a failure


    If either LED no. 4 or no. 5 is defective, the mode must be switched to the 3 LED mode to conform with the regulation. Repair or replacement is nevertheless recommended. If LED no. 1, no. 2 or no. 3 fails, the seat post must in any case be sent to the importer for repair or replacement.

    If the rear light is defected, it must be immediately replaced.

    If you ride with the seat post low, it may be the case that the seat clamp covers one of the lenses. Please ensure that the clamp area is not directly tightened on to the lens as per the illustration below.

    USB port

    When fitting the saddle, please make sure that the small transparent rubber cap for the micro USB connection is clamped under the strut.

    Do not pull on the charging cable excessively.

    If the USB connector is exposed to heat, it may lose its shape.

    We recommend using the supplied USB cable to ensure proper battery charging.
    If you use another cable, please make sure that it is an original Micro USB cable, in the dimensions 10mm wide and 7mm high.

    If the USB plug has deformed, it must be replaced.

    Operating Temperature

    Min: -15° C

    Max: 45° C

    Optimum storage temperature: 20-25°C

  • Shipping
  • Returns and Exchanges
  • Warranty
  • Waste Disposal

  • 1273-39 Bamtijae-ro,
  • Geochang-gun, Gyeongnam,
  • 50147 South Korea