Testo 510i Differential Pressure Meter with smartphone operation

Product Type: Differential Pressure Meter
Pressure Range: -60 to +60 InH?O / -150 to +150 hPa
Resolution: 0.01 InH O / 0.01 hPa
Accuracy: (0.2 hPa + 1.5 % of mv) (+1 to +150 hPa)
Response Time: -4 to 122 F / -20 to +50 C
Storage Environment: -4 to 140 F / -20 to +60 C
Power: 3 x AAA
Dimensions (H x W x T) (mm): 148 x 36 x 23 mm
Model No: Testo-510i
Battery Life: 150 h