Item No. : AJK-B2701 Working Voltage: DC 6. 0v / DC 12. 0v / DC 24. 0v Working Current: <400mA / <200mA / <100mA Charge Time: <10s (rise from o to 300mmHg in 500CC capacity) Tightness: <3mmHg / min Noise: <65dB Maximum Pressure: >450mmHg Flux: >2. 0lpm Pipe Diameter: 4. 2mm External Size: 27*58mm Application: Blood Pressure Monitor, Slimming Waistband, Massage Belt, etc.