Canon Macro Ring Lite ML-3.

Designed for close-up photography with the EF 50mm, 65mm and 100mm Macro lenses. A-TTL flash mode. Guide number of 11 (ISO 100m). Two switchable flash tubes (use either or both) for shadow control. Modelling lights.

This flash is intended for use with older EOS film cameras. Using those, it will provide A-TTL flash (ie flash exposure is adjusted by metering off the film). It does not support E-TTL on the newer digital EOS cameras. It can only be used as a manual flash on digital EOS models.

See here for more details:

https://www.mir.com.my/rb/photography/hardwares/classics/eos/Shared/Macrolites/index.htm