Batch Engraving Button for LaserPecker 2 & LaserPecker 3Batch Engraving: This button is used to do batch engravingEasy Setting: it engraves the same image on the same material, you don't have to set the same settings in APP repeatedly. Easy Use: Just attach this Batch Engraving Button to the handle with a USBcable, with one press, it will do the work. Material: Aluminum alloyWeight: 21gSize: 41*21*10mmColor: Gray