Be at the ready to protect people and property! Guardian hand wand is designed for public and private use including small business, private security, airports, nightclubs, schools, government applications and police departments. Features audio, vibration and LED target alerts. Choose from 2 alternate operating frequency in the event of environmental electromagnetic interference. 8 kHz operating frequencies. Momentary low toggle switch eliminates interference from large metal objects and minimizes the signal from small metal objects. Comfort grip and wrist strap. Low battery indicator. Requires one 9 Volt battery.