This is the top of the range Samsung flashgun for both Pentax and Samsung DSLR's. The Pentax model sells for at least £100 more than this re-branded version.
Was selling at around £240 on Amazon just before Christmas.
Suitable for Samsung GX10, GX20 & Pentax K100, K200, K10 etc.
The flash has several modes, including P-TTL and operates off-camera using the cameras built in flash as a controller.