Features: Dimensions: L x W x H 123 x 40.8 x 65mm Wavelength 630-660nm Power: Class II P 1mW Class IIIA P 5mW Operating current: I 40mA Trigger voltage: DC = 2.3V Operating voltage: DC = 3V Operating power supply: two AAA batteries Distance: straight line design 30 feet long. Color: Orange, Blue, Yellow Feature: 1. Design a straight laserfor line on any surface, not just a point. Adjust the channel line to any angle.2. Applicable to woodworking, stair riser, shelf, molding, tiling or other work requiring accurate alignment3. The double bubble can realize accurate horizontal or vertical calibration, and the telescopic pin can keep the position of the channel line unchanged during operation. Application: pendant, door and window installation, ceramic tile, pendant lamp suspension, ceiling, etc. Package include: 1 * Laserfor level