Single infrared barrier, with 4 TX beams and 4 RX beams, in housing for floor- or wall mounting with related accessories (not included), height 2 metres, maximum range 100 metres with unobstructed view, supply voltage 12-16V DC, consumption 135mA, TX and RX cable synchronisation required, wiring accessories for IP54 waterproof outdoor installation, operating temperature -25 to +65°C with thermostat control 50W 24V AC, output relay for alarm, tampering and exclusion.