Compact - The X1 delivers X Series' uncompromising lighting performance, reliability and durability in a sleek design just 3.9" long by .72" diameter that fits easily in pockets, briefcases, toolboxes and more. Powerful performance - The X1 projects a uniform circular beam up to 65' and offers up to 1-mile signal visibility. Power regulating circuitry provides maximum, non-dimming brightness for up to 10 hours. Thorough quality - The crush-proof, water resistant X1 is designed, engineered and manufactured to provide reliable operation in extreme environments.