Feature●PREXISO 65Ft Square Laser includes 2 Bubble Vials, 3 Nails and 3 AA Batteries; PREXISO 265Ft Green Laser Measure includes 1 x Angle Sensor & 1 x 1/4"-20 Threaded Hole●PREXISO 65Ft Square Laser Level - Precise Positioning - 2 Bubble vials for precise positioning, and ensure a level tile, the two laser lines are at an exacting 90° angle; Alignment guide helps Calculate and turn angles in 5° increments for 90° layout●PREXISO 65Ft Square Laser Level - Convenient and Practical Operation - Simple one-button operation powers 2 perpendicular laser lines on and off. Projects horizontal, vertical and angle at 90 degrees laser “chalk lines” on surfaces, for leveling and aligning laser tool and wall. Green laser is 3 times brighter than red laser with the same light source; PREXISO Square laser projects perpendicular chalk lines on any surface up to 65ft, laser lines are bright and sharp●PREXISO 265Ft Green Laser Measure - High Accuracy Green Beam & 3 Measure Reference, 1/4"-20 Threaded Hole: Features highly visible green beam laser technology. Green laser is 3 times brighter than red laser with the same light source, and gives you maximum green laser measurement range up to 265ft. The measure tool can measure from front/middle/rear reference points and 1/4 inch threaded mount enables it to be attached to tripod or other tools for use making it easy to measure in different scena●PREXISO 265Ft Green Laser Measure - Angle Sensor, Mute Functions & Type-C Rechargeable, Portable: Built-in digital vertical & horizontal tilt angle sensor provides real time measurement. Mute button to turn on/off the beep, suitable for using in library, classroom and other quite places. Li-ion rechargeable battery and USB changing, more environmental and energy-saving, one full charge allows for 5h measurementsDescription PREXISO 65Ft Square Laser includes 2 Bubble Vials, 3 Nails and 3 AA Batteries; PREXISO 265Ft Green Laser Measure includes 1 x Angle Sensor & 1 x 1/4"-20 Threaded Hole. Class II laser product, output less than 1mW.