b-great compatible breathable hook loop armband, replacement for fitbit charge 4/3/se armband (black, medium) b-great replacement armband for fitbit charge 3 or fitbit charge 4 series fitness trackers, soft, breathable, sweatproof and lightweight, idea for anyone who want to wear fitbit charge 3/ charge 4 series tracker on the upper arm instead of on the wrist. <br><br> user guide:<br> 1) remove your current watch band<br> 2) lock the armband connector on the charge 3 or charge 4 series fitness tracker<br> 3) pull your wrist through the armband, move it to your upper arm where you feel comfortable and natural<br> 4) unfold one of the hook-and-loop end fasteners and adjust the strap to fit your arm snugly<br> 5) fold over the hook-and-loop end fastener and close it<br><br>attention: <br> please do not wipe the strap with alcohol or any liquid may contains alcohol, as it may damage the glue of the strap and cause the strap fall apart.