Spectra™ Plus Kit from 6 to 32 zones. Includes 1 SP5500 bidirectional Central Panel with 6 zones (10 with ATZ), expandable up to 32, in a small box (S-BOX) with transformer and capacity for 12VDC/7Ah battery (not included), and 1 TM50 tactile keyboard of 5" Security Grade 2 Certified.