Photo Beams, Product Type Gate Opener Photo Eyes, Includes (2) Photo Eyes, Mounting Hardware, For Use With Gate Operators, Operating Voltage 12V to 24V DC, Color Black, Compatible with Grainger Part Number 13X156, 13X157, 13X161, 13X162, 29RV46, 36A982, 36A983, 36A984, 36A985, Manufacturer Warranty Length 1 yr