. Made of high-quality materials for maximum durability and reliability. Seamless fit. Easy to install, no complicated tools required, easy to use. Professional workmanship, exquisite design, novel style. Type: QRB1 Flame Detector Photosensitive Electric Eye Burner Detection Photoresistor For Burner Waste Oil Note: Installation guide not included; professional installation is strongly recommended. Please check as much as possible to ensure the item is what you need. Tips: The product may be updated constantly; due to different batches, the actual product may have slight differences or color variations, which do not affect use. Color: As shown Material: Plastic Package Contents: 1 x QRB1 Flame Detector Photosensitive Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. Measurement allowed error is +/- 1-3 cm.