Features: 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. If the buyer need toWeld, please make a note on order or explain it in advance! SFP101N ordinary movement with trayHolder 16P; Specifications: Material:Plastic Color:Black Model:DA11 16pin Type:Laser for Head Excitation Mode: OpticalPump Output Form: NPN Triode Type Transmission Signal: TriState Gate Type OutputWave length: 780nm Operation Mode: Continuous Light Path: Inner Light for Path Speed:Low Speed 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.