Disposable magnet fly trap. Attracts and traps a wide variety of flies that pester you outdoors, including house flies, blowflies, barn flies, and more. The bait works by luring flies into the trap. They go in expecting a treat, and find they are unable to leave. Simply pull the string to open the trap and add warm water to the fill line. Add more water periodically to keep it at the fill line. Hang the trap on a tree branch, stake, or other suitable hanger. This trap is intended for outdoor use so you can draw flies away from your home before they can get inside. Hang in warm, bright, calm areas for the best results. Bait may take a few hours before it becomes fully active. Once active, the effectiveness will not diminish over time, providing optimum fly control. When the trap is full, it can be disposed of cleanly. Just snap on the top and discard the entire trap.