Features 1、With the high quality copper shell, it is very durable to use 2、Design for engraver printer machine 3、100mW blue-violet light laser, higher speed, support more types of materials 4、Can be carved items included hardwood, plastic, bamboo, rubber, leather, cut paper and so on 5、Long time use with stable performance Specification Features: With the high quality copper shell, it is very durable to use. Design for engraver printer machine. 100mW blue-violet light laser, higher speed, support more types of materials. Can be carved items included hardwood, plastic, bamboo, rubber, leather, cut paper and so on. Long time use with stable performance. Specifications: Model: D8-LASER100 Voltage: DC 3-5V Shell material: Copper Mode of operation: Continuous Way: Single way Wavelength: 405nm Light color: Blue-violet light Working current: ＜450mA Light power: 100mW Diameter: Approx. 12mm / 0.47inch Length: Approx. 45mm / 1.77inch Battery: 3 x UM-3 1.5V AA Battery (Not included) Mode of connection: 2.1 Straight line socket line (The wire with white stripe is negative pole, socket center is positive pole) Weight: Approx. 54g Package Included: 1 x Engraving Laser Head 1 x Battery Case Package List