Measurement parameters: PM2.5, PM10 in μg/m3, Range of PM2.5: 0-999 μg/m3, Range of PM10: 0-1999 μg/m3, Minimum resolution of < 0.3 μm, Relative error Maximum of ±10% and ±10μg/m3 WI-FI Enabled, Connect up to 5 Wi-Fi SSID passwords, Local memory stores data for up to 2 days PORTABLE,  Size: 11.6cmx11.6cmx6cm. Power voltage: 5V,  Can be charged via laptop/car USB - Weight: 370 gms, Battery backup: 6-8 hours, Re-chargeable battery 3000 mAh,  TESTED AND CALIBRATED, Beta Attenuation Monitor (BAM)