The MecArmy SGN7 is a multi-functional key light designed for every day carry and self-defense. The powerful light can emit up to 550 Lumens of light as a blinding Strobe for disorienting an attacker. The light also features a loud 120dB alarm that can be activated if you ever feel unsafe. The key light runs on an internal Lithium Polymer battery pack, which doubles as a power bank to charge your smartphone or other devices.