Part of a multidrug efflux pump. Confers resistance to cationic lipophilic dyes such as ethidium bromide, acriflavine, pyronine Y and safranin O. The efflux is probably coupled to an influx of protons (By similarity). The efflux pump is composed of EbrA and EbrB. Belongs to the drug/metabolite transporter (DMT) superfamily. Small multidrug resistance (SMR) (TC 2.A.7.1) family. EbrA/EbrB subfamily.