Feature●PREXISO Laser Level Self-Leveling - Cross Line Laser Level includes 1 x 50ft line leveler, 2 x aa batteries and carry bag; PREXISO 265Ft Green Laser Measure includes 1 x Angle Sensor & 1 x 1/4"-20 Threaded Hole●PREXISO 50FT Laser Level Self-Leveling - Highly Versatile & Self Leveling, LED Indicator: Projects bright horizontal & vertical red-beam lines onto flat surfaces and levels in few seconds with high accuracy. Switch to the "unlocked" side, the tool is in self-leveling mode, means the tool will level itself if it is within ±4° of horizontal and the LED indicator keeps in Green. If the surface exceeds ±4° from horizontal, the laser line will gone and the LED indicator goes red●PREXISO 50FT Laser Level Self-Leveling - Application & Universal Usage: Help you with paving tiles, installing photo or furniture carpentry, hanging wallpaper etc. With the 1/4"-20 nut at the bottom of the tool and clamp to door frame or workbench. You can mount the tool to accessories like wall mount or tripod (not included)●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 Laser Level Self-Leveling - Cross Line Laser Level includes 1 x 50ft line leveler, 2 x aa batteries and carry bag; 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.