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.
Plus red sounder base with pcb module, battery, no cover. Grade 3.
Plus green sounder base with pcb module, battery, no cover. Grade 3.