Galaxy Watch4 not included.

Compatible with Galaxy Watch4 series models that fit 20mm straps.

For optimal reading accuracy, your Galaxy Watch4 needs to be snugly fastened to your wrist. When you are not conducting readings, you may loosen the band to provide breathing room. On balance, your watch’s band should not be fastened too tight or loose: make sure that it feels comfortable around your wrist.

Keep your Galaxy Watch4 and its band(s) clean by wiping them with a soft, dry cloth.