Made of high-quality materials for maximum durability and reliability. Seamless fit. Easy to install with no complicated tools required. 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 verify the item is compatible with your requirements before purchase. Tips: Product may be updated periodically; due to different production batches, slight variations in appearance or color may occur, which do not affect functionality. Color: As shown Material: Plastic Package Contents: 1 x QRB1 Flame Detector Photosensitive (other items not included) Note: Light reflection and differences in display screens may cause slight color variation between the image and the actual item. Measurement error allowed is +/- 1-3 cm.