Features: Consistent brightness until the indicator lights up 3 modes (automatic on/automatic flashing/constant on) Dimming function when stopped in constant-on mode Brightness can be switched Automatic on/automatic flashing mode: Approximately 8lx/approximately 800cd (10m ahead) Constant-on mode: Approximately 15lx/approximately 1,500cd (10m ahead) Compatible with lamp brackets Can be mounted on front fork lamp brackets Details: Model number: NSKL153-B (Black) Body dimensions: Approximately width 40 x depth 110 x height 42mm Weight: Approximately 135g (including Panasonic alkaline batteries) Light source: White LED x 1 Power source: 3 x AA batteries (sold separately) Battery life (at 23°C): (When using Panasonic alkaline batteries) Automatic on: Approximately 32 hours Automatic flashing: Approximately 160 hours Constant on: Approximately 16 hours Illumination range: Approximately Φ10cm (1m ahead) Mounting position: Front fork lamp bracket