Dimensions: 1.5" x 1.5" x 0.69". Water resistant. Impact resistant. Rechargeable. Modes: Constant On (4 lumens, 11h runtime); Flashing (4 lumens, 21.5h runtime); RGB transition (28h runtime). USB-C charging. Requires (1) Lithium battery (included). Plastic construction. Color: Green. Boxed.