PORTEK LASERSTRIKE Handheld Silent Bird Scaring Laser. With its advanced laser technology, LaserStrike is the ultimate silent bird scarer! The LaserStrike uses optical quality precision lenses and components and has been specifically developed for use as a safe, effective and silent, birdscaring tool which is ideal for agricultural use in built-up areas and buildings where loud noises are a problem to livestock and the general public. LaserStrike is designed to scare and clear birds at close range and at distances of up to 600m. It is most effective when used in low light conditions. And at dawn and dusk when the birds are most active. 2x 2400 MAh rechargeable batteries. 2x keys for secure use.