TESTO Differential Manometer, -60 to 60 in wc

Differential Manometer; Maximum Pressure 60 in wc; Minimum Pressure -60 in wc; Accuracy +/-(0.1 in wc + 1.5 Percent of mv) (0 to 60 in wc); +/-0.02 in wc (0 to 0.4 in wc); Includes Batteries Yes; Process Connection Size 1/8 in; 1/4 in; Process Connection Type Hose Barb; Wireless Connectivity Bluetooth; Alarm No; Application Air; Auto Power Off Yes; Batteries Required Yes; Battery Type (3) AAA; Calibration Certificate Included Yes; Compatible Smart Phones Android 4.3; Bluetooth 4.0; iOS 8.3