Cover compatibility table_Internal attachment

  • Available
    • Smartphone: smooth back
    • Case: Shape: One or more holes in the charging port Material: Silicone, soft case
  • Usage prohibited:
    • Smartphone: Matte finish, textured back
    • Case: Shape: No charging port hole Material: Hard case


  • Please use it by placing it between your smartphone and the cover.
  • We cannot guarantee attachment to covers other than those listed below, so please check carefully. Please note that even if this is possible, the case may float due to the 0.6mm thick sheet being inserted.
  • We cannot take responsibility for damage or malfunction of smartphones that are dropped due to SYANTO.

How to install and handle SYANTO Catch O

The following is how to install a case with only the charging port open.
Please use the fully open type by attaching the suction part to your smartphone.
See the video for details.

1. Remove the case

2. Peel off the protective sticker

3. Roll up the adhesive part

4. Insert into charging port

5. Open with the suction part facing up.

Although it can be installed with either side of the suction part facing up, It is more stable to attach it to your smartphone. Also, the length of the ring can be changed depending on the position of the suction part, so please adjust it according to your preference.

・If you want to make the ring longer, please make it as long as possible.

・If you want to shorten the ring, attach it to the top.

6. Attach the smartphone from above

Please be careful not to move the suction part. The suction part can be reattached, so if it moves, you can readjust it.

7. Completed

If you don't do it, the effect will be halved!

Recommended way to hold it

Even a convenient ring will be half as effective if you hold it incorrectly. Learn how to hold your smartphone correctly and enjoy a comfortable smartphone life.

See how to hold it