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2025. 11. 12 - 12. 07 LightSKIN BLACK FRIDAY!

Handlebars Seatpost Ultra mini lights Lights Smart controller
S311
S311
S311
S311
S311
S311
S311
S311
S311
S311
S311
S311
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S311

Rechargeable battery type
Compliant with StVZO (German Road legal)

Check the guideline Before you buy E-bike type

diameter(center): 27.2

length: 350

color: polished silver

$90.00

$100.00

In stock, ready to ship

1. Delivery Information (International Shipping)
Processing Time: Your order will begin processing and dispatch starting on the 3rd business day following order confirmation.
Delivery Time: Delivery typically takes 5–7 business days from the date of dispatch, depending on the destination address.

2. Returns and Refunds (Important Notice)
PLEASE READ CAREFULLY BEFORE PURCHASING

Our pricing is based on a "Shipping Fee Included" condition, meaning the actual international shipping cost to deliver the product to you is initially covered by the seller. Due to the high costs associated with international freight, our return policy is as follows:

Return Shipping Cost: The customer is responsible for all return shipping charges. All returns must be sent prepaid.

Refund Deduction Warning: Your final refund will be the original purchase price minus the actual international shipping cost that the seller initially incurred to send the item to you.

1. Shipping Fee Policy

All product prices displayed on our website include the standard international shipping fee. You will not be charged extra for shipping at checkout.

2. Shipping Carrier & Time

  • Carrier: All orders are shipped from South Korea using reliable express carriers, UPS or DHL.
  • Processing Time: Orders are processed and dispatched within two (2) business days following order confirmation.

  • Delivery Time: Delivery times vary based on the destination country, but generally take 5 to 7 business days after dispatch. Please note that these are estimates only and are not guaranteed.

3. Tracking and Notification

  • Shipping confirmation and tracking information will be sent to your registered email address once your order has been dispatched from our facility.

4. Customs and Duties (Customs Clearance)

  • Customer Cooperation Required: The customer is responsible for cooperating with local authorities and the carrier by submitting any necessary information or documents required for customs clearance in the destination country.
  • We are not responsible for delays caused by customs processing. Any duties, taxes, or import charges incurred are the responsibility of the customer.

Customer Responsibility for Return Shipping: Should you wish to return or exchange your product, the item must be shipped back to LightSKIN prepaid (at your own expense).

Refund Calculation: Your refund amount will be the original product price minus the actual international shipping cost that was incurred when the order was first dispatched to you. The minimal shipping fee you paid at checkout does not cover the true cost.

Prior to Purchase: Due to the high logistics costs associated with international returns, we strongly advise you to review your order carefully and consider this policy before making your purchase.

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.

  • Diameter (㎜) : 27.2 / 30.9 / 31.6
  • Length (㎜) : 350 (D 27.2 / D 30.9 / D31.6)
    400 (D 30.9)
  • Color surface finish : Polished Silver / Matt Black
  • Seatpost Type : 2 bolt clamp, offset 9mm, mechanical stopper
  • Seapost material : Aluminum 6061 T6

  • Lens Type : Protruding
  • Light Module : 2 wide angle red LEDs,
  • 3 high brightness red LEDs
  • Brightness : 12 cd
  • 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 : 2.5 h

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

  • Approval Code : K-1595
  • Seatpost test standard : ISO 4210 City, Mountain
  • Compliant with standard or directive : CE, RoHS, UN3481, StVZO §22a TA Nr.14b (Rear lights for bicycles), IPX5
  • Package Contents : Rear light seatpost, USB charge cable (200cm)

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The Details

  • Diameter:

    27.2mm ⁄ 30.9mm ⁄ 31.6mm

  • Seatpost Length:

    350mm (D 27.2 ⁄ D 30.9 ⁄ D31.6), 400mm (D 30.9)

  • Seatpost Type:

    2 bolt clamp, offset 9mm, mechanical stopper

  • Seapost material:

    Aluminum 6061 T6

  • Approval Code:

    K 1595

  • Brightness :

    12 cd

  • Power Source:

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

S311

The S311 is a powered by a built in, non-removable, rechargeable battery. This is a product that is charged with the included 2m long charging cable.
StVZO version available in Germany, only continuous mode is provided. S311 has the top two lenses protrude, a side view is always provided for safety. The StVZO version restricts the minimum insertion position so that the mechanical stopper does not go down any further as the top three lenses must always be exposed.

Charge state

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.
  • Charging : 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

Integrated lights

Lights are in frame. Light skin’s special design brightens the way ahead.
Turn them on and off with a simple tap. Be seen by others on the road, everaware of your surroundings.

S311

Patented seatpost with an integrated seat rail clamp.

The seatpost tube features 5 holes in which the LEDs are enclosed.    

S311’s USB 2.0 charging port is 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.

Rearlight for bicycles integrated in the seatposts

This bicycle seatpost with integrated rear light
ensures the visibility and safety on the road with its glare-free LEDs.

ASSEMBLY

Use the correct diameter corresponding to your bicycle frame. Use the appropriate tool to fasten the saddle support. The minimum insertion length into the frame is 100mm. The rear light must be aligned so that it shines backward. The connector of built-in light seatpost and the connector of power source should be compatible, which must be ascertained before the purchase of the product. 

S311 Shipping

Package Contents

  • rear light seatpost
  • USB charge cable(200cm)

Shipping

Weight

  • 27.2 – 350L : 0.66kg
  • 30.9 – 350L : 0.68kg
  • 30.9 – 400L : 0.70kg
  • 31.6  – 350L : 0.68kg.

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Dimension

  • 430*65*80

Safety instructions

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.

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