X green sounder base with pcb module, battery, no cover. Grade 3.
X black sounder base with pcb module, battery, no cover. Grade 3.
X blue sounder base with pcb module, battery, no cover. Grade 3.
X amber sounder base with pcb module, battery, no cover. Grade 3.
Deltabell Plus Module only.
Plus white sounder base with pcb module, battery, no cover. Grade 3.