The DS400 Aneroid Sphygmomanometer is a robust and reliable handheld cuff inflator used for manual inflation of vascular cuffs. The DS400 pumps easily and is ambidextrous for easy operation with either hand. Precise deflation control is achieved with a trigger-type valve located at the back of the DS400. It can be visually checked for calibration and calibration is guaranteed for 10 years. The DS400 can also be used with our MV10 Segmental Cuff Selector for inflating multiple cuffs. It fits easily and comfortably in the palm of your hand!