Specification Wavelength:365nm Spectral range: UV 250-410nm Intensity range: 0-5,000 mW/cm2 Span range: 0-999,999 mJ/cm2 Tech accuracy: í+5% Battery: 3.6V Li Battery life: 30000H Dimension:128*14mm dial type Weight: approach 500g Endure temp:110íµ Calibration: one year Auto power-off:1 hour