E white sounder base with pcb module, battery, no cover. Grade 3.
E red sounder base with pcb module, battery, no cover. Grade 3.
E green sounder base with pcb module, battery, no cover. Grade 3.
E black sounder base with pcb module, battery, no cover. Grade 3.
E blue sounder base with pcb module, battery, no cover. Grade 3.
E amber sounder base with pcb module, battery, no cover. Grade 3.