BOSCH GLL50-20 50 Ft Self-Leveling Cross-Line Laser, Includes Integrated Magnetic Mount & 2 AA Batteries

POWER FLEXIBILITY: The laser works with two AA batteries (included) or Bosch’s 3.7V Lithium-Ion 1.0 Ah battery (sold separately), for less downtime on the job.
DURABLE: The laser is IP55 rated to withstand tough jobsite conditions such as rain or dust.
ACCURACY: The laser has bright, thin lines that level within 5/16 inch accuract at 30 feet.
SELF-LEVELING- The smart pendulum system self levels and indicates out-of-level condition by blinking and locks when switched off for secure transport.
EASY-TO-USE: The laser is egonomic, compact and lightweight for easy use and storage.
CLASS II LASER: 630 – 650 nm; <5 mW