Technical specifications: Working Range: 0~15 m Levelling accuracy: ± 1.5mm at- 5 m Line accuracy: ± 1.5mm at - 5 m Levelling time: < 4s Self-levelling angle: ≤ 4° Laser Type: 650nm Laser Class: Operating temperature: 0~+40‚ÑÉ Operating temperature: -20~+70‚ÑÉ Batteries: AA(1.5V)x3 Additional features With magnet With hanging hole With Laser Cross Function With Horizontal Line Function With Vertical Line Function Dimensions and weight without batteries: 305 gm Dimensions: 98× 58× 96mm.