- Intelligent microprocessor driven system
- 40 ft. detection range across doorway
- Four user selectable chime sounds
- Advanced circuit integrated with active-infrared beam technology
- High/low volume control
- Expandable using additional chimes (CM-5)

- Microprocessor driven system
- Independent entry/exit counters
- 20 ft. detection range across doorway
- Resettable 4-digit digital counter (up to 9999)
- Distinctive entry/exit chime sound
- Electrically erasable memory (EEPROM)
- Selectable detection range 10 ft. min., 20 ft. max.
- Chime volume control
- Expandable using additional chimes (CM-4)
- Door bell feature using optional call button (AES-1)

- Advanced dual-infrared beam and superior wireless technology
- Wireless multi-function receiver
- Dual channel receiver with status LED’s
- 20 ft. detection range across doorway
- Independent entry/exit counters
- 200 ft. wireless RF transmission in open field
- 2 selective chime sounds per channel
- Chime volume control
- Resettable 6-digit counter (up to 999999)
- Power failure memory back-up
- Wireless push-button included
- 16 million I.D. codes system