Live at Mayhem 31-05-14 supporting Nurse with Wound.
The ZirenZ: Asta Salicath Halvorsen, Daniela Luciani, Dzejna Oman, Klara Utke Acs.
The ZirenZ plays vintage tone generators.
The above is all the information about the ZirenZ that I could dredge up from the Internet. They are most probably a Danish group.