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      Product Details

      • Model: UiiSii K8
      • Style: In-ear
      • Communication: Wired
      • Connectors: 3.5mm
      • Line Length: 120cm/3.93Ft
      • Vocalism Principle: Hybrid technology
      • Frequency Response Range: 20-40000Hz
      • Sensitivity: 104±3dB
      • Resistance: 16Ω
      • Speaker size: 10mm

      Package Contents

      1 x Earphone

      1 x English Users Manual

      1 x Storage Bag

      3 × pairs of earplug



      Hi-Res Certificate                        Manual

      Terms of Payment

      We accept PayPal (PayPal express checkout) and Card Payments (Visa, MasterCard, American Express, Discover, etc.) by Stripe.

      You can safely enter your entire credit card number via our secure server, which encrypts all submitted information. 

      Please provide a valid credit card and correct credit card information, otherwise payment will be rejected. 

      Note: Your transaction and payment details are handled by Stripe and Pay pal, our secure payment service-provider that upholds strict banking standards. 

      Your credit card details are sent directly to the bank and cannot be read or accessed by any other parties than your bank.

      Shipping & Return Policy

      Shipping Plolicy:

      What Shipping Methods Do You Provide?

      Our shipping team's sole goal is to get your orders processed and despatched to you in the shortest amount of time.  We provide two shipping methods for you: Standard shipping and Fast Priority shipping.


      • We provide standard free shipping for orders over $30.
      • Standard shipping is handled by the post office and usually takes 10-18 days for shipping


      • We select DHL/ FedEx express for priority shipping.
      • Priority shipping with 3 - 7 day delivery available to most locations, prices vary by location and displayed at checkout.
      • For order value is higher than $60, we suggest choose fast shipping that delivery success rate is guaranteed.
      • Please note all EU countries and Canada impose tariffs for commercial express. Tariffs will be paid by the customer when the product is delivered, so we recommend that customers in these regions choose standard shipping.

          How long does it take to receive my order?


          North America(USA,Canada, Mexico)

          10-16 days

          Australia & New Zealand

          10 - 20 days

          All Europe

          6 – 14 days

          Japan, Singapore & S. Korea

          7 – 10 days

          Rest of Asia

          10 - 20 days

          South America

          20 – 30 days

          Other regions

          10 – 30 days or more.


          North America(USA,Canada)

          – 7 days

          Australia & New Zealand

          5 – 10 days

          Asia 3  5 days


          How to tarck my order?

          Once you have placed an order we will send you a confirmation email. After your package has left our warehouse and begun the delivery process, we will send you another email with a final confirmation and tracking number.

          Using the tracking number you can follow the stages of delivery on your chosen shipping company's website for an estimation on when your product will arrive.

          For more detailed tracking information for your order, try copying & pasting your tracking number into the search bar here: After ship tracking
          This website will show you the most up to date tracking information with your local mail carrier.

          Key Poins To Note:

          • If you can't receive your products due to an incorrect address we don't take any responsibility and we don't give a refund. Please double check all information before confirming your order.
          • If you need to make changes to your order, please email us within 24 hours of placing your order and we will be happy to make the required changes. If your order has already been shipped we will not be able to change it unfortunately.
          • During festive periods, please allow more time for delivery. We do apologize for the inconvenience caused.
          •  Note that delivery times may be longer than usual when the parcel reaches the destination country if unexpected delays occur when handed over to the local express service. (Usually didn't happen)


          Returns Policy:

          For products purchased directly on www.uiisii.com, we offer a 30-day return guarantee to ensure your happiness. The 30 day period begins upon the purchase date of your order. Please Click Here go to our help center submit return request and reason.

          Please note, we only accept unopened original packaging products return due to health and hygiene reasons. It is your responsibility as a customer to cover the return shipping costs and if Items lost in transportation will not be compensated for. If you would like to track your return, please check with your logistics company/post office.

          Refunds for returned merchandise will be made within two weeks of the return of the product, to the original purchaser’s credit card.

          Items bought from authorized retailers cannot be returned to us.

          Warranty Policy

          Uiisii One Year Limited Warranty

          Uiisii electronic.,co Ltd (“Company”) hereby warrants that, under normal use, this product will be free from defects in materials and workmanship for a period of one (1) year starting with the original retail purchase date. The replacement warranty is valid only if the original proof of purchase issued to the purchaser, specifying the date of purchase, is presented with the product to be replaced.

          What will be done in the event of a warranty claim?

          Uiisii does not honor any warranty claims that are not accompanied by the original documentation. To get the product repaired or replaced under this limited warranty, you must first contact us and include the following: Click here go to uiisii help center and submit a valid claim request under the Warranty, including:

          A short description of the defect/malfunction
          The proof of purchase (your order number or order screenshot.)
          Your name, address, e-mail, and phone number

          Once your warranty claim is reviewed by uiisii we depending on the individual circumstances, provide Warranty service through one or more of the following options:
          (a) repair your product using new and/or previously used parts that are equivalent to new in performance and reliability.
          (b) replace your product with a product that is at least functionally equivalent to the product and is formed from new and/or previously used parts that are equivalent to new in performance and reliability.
          (c) refund your purchase price in exchange for the return of your Product.

          The Uiisii Warranty does not cover:

          This warranty is not covering all the Accessories, Spare Parts, Replacement Parts items. They are wear and tear items, and damage that naturally and inevitably occurs as a result of normal wear or aging.

          Didn't Purchase directly from uiisii official store(www.uiisii.com) but other third-party sellers.

          Defects and damages due to dropping, mechanical damage, dirt, cerumen, damp, moisture, chemical products, abnormal impact damage, loss, theft, fire or force majeure.

          Esthetical changes, defects, and damages due to normal wear and tear, or aging.

          Customer Reviews

          Based on 13 reviews
          The ear buds are comfortable, the sound is great

          The ear buds are comfortable, the sound is great, it is easier to pack and carry, and it blocks out all unwanted noise. What more could you want. Don't waste your time and money on anything else, BUY THIS PRODUCT! As soon as I am done with this review, I am going to buy a set for my wife. FANTASTIC PRODUCT, and CAN'T BEAT THE PRICE. The little case is also great!! i recommend.

          Hi Scott Ingerson,I'm glad to hear that you like the headphone of K8.Customer support is our driving force for progress.We will try our best to bring you a better music experience.

          The quality is excellent

          Appearance, beautiful, nice sound, satisfied with the order. The price is very affordable. The quality of this product is beneficial to the seller. Very satisfied. Thanks to the seller.

          Hi Sonoma vines,I'm glad to hear that you like the K8.Customer support is our driving force for progress.Thank you for your support Uiisii,We will try our best to bring you a better music experience.Have a nice day!


          The quality is excellent, there are basses. thanks to the seller

          Great sound, durable construction

          They passed the ultra-deep bass test. Treble is crisp. The bass doesn't have the *wow* factor, like my VAVA dual-driver bass earbuds, but it is almost as ear-hair vibrating. 😊 I love the construction! That gets an AAA+++ from me! The wires look like they are encased in a fine steel mesh, under the outer silicone layer, which is super-important, as much as I use earbuds - hours daily, every day (I have 2 pairs, because I spend my time at 2 different houses...don't have to worry about forgetting to take my earbuds with me, just leave a pair at each place). The noise cancellation is excellent! Nice zippered carrying case, extra buds of several sizes...you definitely get your money's worth!

          Hi Billy Joe,Thank you for taking the time to share your thoughts about UIISII headphones. Customer support is our driving force for progress.We will try our best to bring you a better music experience.
          I love these

          These are great. I bought them for college as the dorms can get loud when I want to study or sleep, and they block out most background noise. No, it is not completely noise canceling, but they are not full ear enclosing or super expensive quality like 100% noise canceling headphones. Even if I do not have any music playing at all I often don't even realize my roommate is trying to talk to me or that there is a commotion in the hallway, and they sound great. The wire feels like it is metal but coated in a plastic which makes them feel very durable. 10 out of 10, would recommend.