Bring increased safety to your fingertips with Down Alert. Hardline's Down Alert PSD is a highly visible signal that alerts nearby boaters of your presence in the water. Ideal for use during any watersports activities, this personal signaling device will drawn attention to anyone floating in the water, helping avoid boating accidents. Down Alert is lightweight, compact, easy to use, and does not interfere with your watersports. When you're ready to signal, simply pull on the string, slide the PSD over your hand and arm, and raise it to alert others so they avoid your area.