E3 flasher is actually a PS3 downgrade dongle which uses for downgrading your V3.56-V3.73 PS3 to V3.55.these days the official site has released some news about this item, i will just put them here in one post.
E3 flasher news
1. New E3 flasher update released, it will backup bios 3 times automatically. We suggest user verify those bios with E3 Nor dump checker, to assure the backup bios is no erro .
And E3 CLIP SUIT available now, it come with E3 NOR clip and E3 linker. E3 flasher can also work with E3 linker which need solder wires. 2011-11-22
2. Some user install clip not well, so maybe they get an erro backup bios. We suggest user dump ps3 bios 3 times, verify those 3 backup bios with E3 Nor dump checker, this way will lower the risk of brick ! 2011-11-20
3. E3 Nor dump checker V1.0 released. It help you check if the backup bios is corret or wrong. We suggest user check the backup bios first before downgrade, it will lower the risk of brick ! 2011-11-17
4. Some user get console bricked because of wrong operation. Here enclose way to fix if console bricked. 2011-11-03
5. Today we stopped the production of E3 flasher limited and start to provide E3 Nor flasher . The E3 Nor flasher function is same as E3 flasher limited and include 4 parts which is mainboard, cover board, CLIP with softboard and metal cover. It works on all Nor flash console and No solder. The E3 Nor flasher suggested retail price is USD78 . 2011-10-31
6. New update to support Samsung NOR FLASH, click here to download and upgrade the E3 FLASHER. 2011-10-28
Source: E3 site