The Birds Away Bird Scare Spider (sd–sp10) is a battery-operated decoy designed to scare away woodpeckers. It's sound activated, and drops down on 18 in. string to scare off the birds. It climbs back up again to wait for another motive. It's a visual repellent, designed to effectively chase away a variety of birds on the area. Woodpeckers do not like to feel surrounded by predators and with the product's design, the woodpecker would be less likely to remain on your premises and just leave. It's most effective to put on trees, either in your garden or backyard. This will effectively chase away woodpeckers and keep them away from your house or buildings, even any outdoor setting. Uses 2 AA batteries (not included).