Features: Mobile DVD laser for head bald for head HD870 single for head universal generation SF-HD62 65 850; The laser for head has electrostatic for protection solder joint. Before use, please use an anti-static soldering iron to heat, then pull outPlug, and open the for protection solder joint (silver tinPoint) on the laser for head. It must be completely disconnecte, otherwise the disc will not be read without light, and the laser for head objective lens must not be touched/falled during the installation process, and the potentiometer must not be adjusted by yourself. It will cause the laser for head to burn the tube! It is recommended that non-technical personnel purchase movement directly, the replacement is simple and convenient, and the laser for head cannot read the disc due to incorrect installation. All product in our shop are shipped after factory testing is OK, and theQualityControl is very strict. Specifications: Material:Plastic Color:Black Operation mode: single pulse OpticalPath: Reflective external opticalPath LowSpeed Line width: 100mm DualChannel Output form: photosensitive device type Excitation mode: electric excitation OutputWave length: 100nm Package Includes: 1x Laser Lens note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.