We use urethane blades that are safe even if you put your fingers in them.
Comes with a convenient hook.
Light source: 18 LEDs (light emitting diodes)
Power source: 2 DC3V AA batteries (sold separately)
Battery life: LED light = approximately 36 hours continuous, Fan (High) = approximately 28 hours continuously, Fan (Low) = Approximately continuous 48 hours (when using alkaline batteries) *Varies depending on usage conditions.