Features :

Self-levelling cross line laser is accurate to ±0.3 mm /m in levelling applications. 
Built-in magnetic pivot bracket mounts easily on to metal surfaces. 
Overmolded housing helps maintain calibration under jobsite conditions. 
Includes 3 (AA) batteries for 20+ hours runtime. 
2-button operation and low battery indication for ease-of-use. 
Self-levelling up to 4° surface angle with automatic out-of-level indication, marks a levelled line in seconds. 
Kit box protects unit and helps maintain calibration when stored in gang box.

Specifications:

Power supply: 4.5V - 3 x AA. 
Self-levelling range: avg. 4°. 
Laser class: 2, <1mW. 
Accuracy: +/-0.3 mm /m. 
Indoor visibility range: 15m. 
Tripod connection: 1/4in. 
Number of beams: 2. 
Direction of beams: vertical/level. 
Weight [excluding battery]: 0.46Kg. 
Width: 61mm. 
Length: 112mm. 
Height: 113mm.

Supplied with 3 x AA size alkaline batteries, wall mount bracket and heavy-duty carry case.