2.13'' overall. Water resistant. Impact resistant. Keychain. CREE XP-G3 LED. 500 lumens with 15 hour max runtime. 85m beam distance. Fluorescent whitening agent detection. Signal light. Counterfeit detecting. USB-C rechargeable. Requires (1) Lithium battery (included). Stainless construction. Color: Gray. Clam packed. May not ship to Australia. May not ship Post Office.