Cheap And Discounts DC/AC 12~24V Waterproof IP55 Photocell Automatic Gate Door Safety Sensor Alarm Infrared Beam Sensor Photocell 20m Detect Range Wholesale. Buy Directly From Merchant SZGALO Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.