BOSCH GLL 3-80 CG 360 Degree Plane leveling with Bluetooth Connection Line Laser Leveling Tool Bosch Measuring3 x 360 bold green lines for optimal visibility. Simply connected. 1Bright green laser lines offer up to four times better visibility than red lines 2Very precise CAL Guard monitoring and remote control use with Bluetooth connected smartphone app 33 x 360 lines allow simultaneous horizontal and vertical levelling applications for highly efficient work Laser diode: 500 540 nm, < 10 mW Operating temperature: 10 40 C Storage temperature: 20 70 C Laser