Attaches to clothing or pack with a Velcro strap. Movement causes a steady ringing to warn animals of your presence. Magnetic strap eliminates noise when not in use.<br/>Coghlan's Magnetic Bear Bell attaches to your clothing, pack, or even your pet's collar, with a hook and loop closure. Movement of the person or pet it is attached to, causes a steady ringing to warn animals of your presence. Use the magnetic strap to eliminate noise when not in use.