Bolt VX-760C Wireless TTL Flash
Talk about Smoking Strobes!
The Canon 580EX II which has a guide number of 45 at ISO 100 & 50mm.. This flash claims "Guide Number: 164' at ISO 100 & 50mm".
Like they say, if it sounds to good to be true then it probably isn't. This is most likely the greatest exaggerated guide number I have ever seen in print.
It isn't stated that this is a Master Flash so it is probably a Slave Flash, much like the Canon 430EX II. Personally I would buy a 430EX II, a Nissin Di622 II, or a Yongnuo YN-565EX.
Living and loving it in Bangkok, Thailand. Canon 7D - See the gear list for the rest.