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Seatpost > International

The light of S321 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 socket is located in the bottom of seatpost.


    27.2 / 31.6



    Color and surface finish

    Polished Silver, Matt Black

    Seatpost Type

    2 bolt clamp, offset 9

    Seatpost material

    Aluminum 6061 T6 

  • Light unit


    LED Flux[lm]

    Max illuminance point[lux, @10m]



    Life time

    Max power






    Sports mode






    Turing mode






    City mode






  • ETC

    Seatpost test standard

    ISO 4210 City(27.2), Mountain(31.6)

    Compliant with

    standard or directive

    UN3481, IPX5

    Package Contents

    Rear light seatpost

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 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 minimum insertion length into the frame is 100mm. 

  • Function

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

    Push and hold for 2 sec

    change between the 3 and 5 LEDs

    Single push

    5LEDs) chase  flashing  sparkling  continuous  off

    3LEDs) chase  flashing  sparkling  continuous  off

  • Charge state

    Low battery alert

    Indicated by a blue LED near the third led. As soon as this LED lights up, the battery still has enough capacity to power the LEDs for 1 more hour.


    The Lightskin seatpost LED module's USB 2.0 cable can be connected to a laptop or smartphone charger for charging. The USB plug is located under the Seatpost and the Seatpost should be removed for charging.

    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 3rd LED flashes in blue. The flashing stops, changes to continuous blue light on when the battery is completely 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.

    Use on German roads

    This product may not be used on German roads. If you want use on German roads, please use StVZO-type products.

    Steps to take in

    the event of a failure


    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 charging cable

    Do not pull on the charging cable on the bottom of the seatpost excessively.

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

    Operating Temperature

    Min: -15° C

    Max: 45° C

    Optimum storage temperature: 20-25°C

  • Shipping

    Please be aware before order. The import tax will be charged to you separately. Taxes may vary depending on the country. If you want to return or exchange, you will be charged a Fedex round-trip shipping fee. Prices are inclusive of basic international shipping. Regions where additional shipping fee are generated will be charged at the payment window.

  • Returns and Exchanges


    Please send us unused products by prepaid, will refund you after confirming arrival.


    Please send us unused items by prepaid, and send $25~$35 re-delivery courier fee depending on your location. After receipt the goods and courier fee, we will replace it with another product.

  • Warranty

    Seatpost and light module: 2 years from the date of purchase.

    In case of warranty, (replacement or repair), please contact the distributor through whom the product was purchased.

  • Waste Disposal


    The product packaging is made of recyclable materials.

    Dispose of these environmentally friendly in the provided collection containers.


    Old appliances and batteries must not be disposed of with normal household waste.

    According to EU Directive 2012/19/EU, the product must be disposed of properly at the end of its service life. Return the old device to a collection point for electronic waste or a recycling center.

  • Malfunctions


    The LEDs are numbered from top to bottom

    If LED numbers 4 or 5, or 4 and 5 are defective, it is permissible to switch to the 3-LED mode, which complies with the approval. A repair or replacement is still recommended.

    If LED numbers 1, 2 or 3 are defective, the seatpost must be sent to the importer for repair or completely replaced.

  • 상호명에버그린아이앤디
  • 주소경남 거창군 거창읍 밤티재로 1273-39
  • 대표이재용
  • 사업자번호621-13-87482
  • 고객센터070-4222-1273