Model: W3 (BSX312) Type: Wrist BPM Certification Available : FDA,CFDA,ISO13485 Measurement Method: Oscillometric Method Pressure Range: 0 to 290mmHg Pulse Range: 40 to 180 Beat/Minute Pressure Accuracy: Pressure:�±3mmHg; Pulse:�±5% LCD Display: 2.2 inch Date/Time: Month+Day+Hour+Minute Included cuff Size 13.5-19.5CM Backlight: optional Without backlight/One Color/Three colors Voice broadcast:optional Silence /English voice /other language USB-Micro Cable :optional With /Without Power Source:optional 2*AA Dry battery /DC 3.7V Lithium battery Product Dimension 66*80*30mm(without cuff), 66*80*70mm(with cuff) Product Unit Weight Approx.116g (weight with cuff) Package Includes 1* Blood pressure monitor with cuff optional *AA Batteries /Micro USB cable 1*Manual(English) PACKING 1pc/giftbox, 50pcs/carton, CTN size: 495*495*236mm N.W:10.92 , G.W: 11.74kgs 20''Container : 23000pcs 40'' Container: 47500pcs