Canon Macro Ring Lite ML-2 dedicated flash head, including power pack for Canon T90 camera, on the flash head you can select side lighting either on the left or right hand side or can set both banks of light off for even illumination of the subject. Also included is the adapter. (Eye cup shown in the photo is not included) Purchased for £75 in 2009 by a family collector checked and turns on (see photo) & flashes. it is believed to be in full working order but I'm not an expert so sold as 'untested'
eBay