The Nitecore TUBE is an incredibly popular and versatile multi-purpose keychain flashlight. Equipped with a sturdy dual ring metal attachment, the TUBE is designed to attach to your keys and securely stay in place. Equipped with a high-performance LED offering a maximum output of 45 lumens, this light has two brightness levels to choose from so you have instant light conveniently accessible without having to drain your phone battery. Plus, the built-in rechargeable battery and onboard USB charging functionality mean youll always have power when you need it. With all these great features, this little light is sure to meet all your illumination needs!