Texas, USA: eBay seller OEC Camera have listed two AC/DC studio flashes manufactured by Mettle. The 300AD and 600AD are 300J and 600J Bowens-mount flashes operating on 110VAC or an included 16VDC battery pack. They are similar to the Adorama Flashpoint M and Quantuum R+ Dual Power series.
The Kurbster (who supplied the picture above) has written a hands-on review of the Mettle 600AD which can be found here. The specifications are the same as the Quantuum R+ Dual Power with exception for the AC voltage:
Quantuum R+ Dual Power
| Model | R+300 | R+600 | |
|---|---|---|---|
| Power,Ws | 300 | 600 |  |
| GN, m | 58 | 78 | |
| Recycle, AC/DC | 1.5 / 5.5s | 1.5 / 5.5s | |
| Steps | stepless | stepless | |
| Minimum | 1/32 | 1/32 | |
| Modelling | 150W | 150W | |
| Flashes | 180 | 90 | |
| Mount | Bowens | Bowens | |
| Pack | Battery Pack | Battery Pack | |
| Outputs | 1 | 1 | |
| Weight | 1kg | 1kg | |
| Size, mm | 195x165x65 | 195x165x65 | |
| Price | €255 AU$600 | €359 AU$750 |
|
| Aliases | Mettle 300AD, 600AD - Proxistar PS-300C | ||
| Retailers | Foto-Tip (PL) - Photo-Shop-Studio (AU) - Mediaresort (DE) - OEC Camera (USA) | ||
The Mettle 300AD and 600AD are priced at $257.75 and $298.25 respectively at OEC Camera.