Manual flash lamp SPECIFICATIONS *Manual triggering by push button only *Flash duration +/- 16 hours *Flash frequency: 51 to 54 flashes per minute *White LED flash *Can be tested by wetting the metal contacts *Tamper-proof clip for attaching to strap *Compact and lightweight *Dimensions: 63 x 25 x 17 mm (24 mm above LED) *Weight 37 g with clip