Metric Guide Number 20, with ISO 100 / 21.
- Add-on flash unit for Leica's Minilux zoom camera
- More powerful and versatile than the built-in flash
- Flash-burst times from 1/30,000th to 1/200th of a second
- Approximately 280 flash releases from each pair of batteries used
- Weighs just 2.5 ounces (plus batteries)