Specification Brand : GalaxyElec BulletPoint1 : Delivery time: 7-18 days by special line for USA , 8-25 days by regular post for Worldwide,If it is not received within the specified time, please contact us and we will refund you in full. BulletPoint2 : If you need the product urgently, you can choose expedited service. We will use DHL to serve you. Delivery time: 3-7 days. BulletPoint3 : We are a professional distributor of electronic products.. Just search keywords in our store. BulletPoint4 : Please note that the products are only offered by the brand: GalaxyElec. Other sales people is not reliable. BulletPoint5 : any question,please feel free to contact me. ExternallyAssignedProductIdentifier : 5302611333733 ItemName : IR Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module for Motor Test ItemTypeKeyword : electronic-component-optical-sensors Manufacturer : GalaxyElec Material : Copper PartNumber : GEmoduleo_11378 ProductDescription :