SX1911 Ac digital Millivoltmeter is suitable for measuring when frequency is within the range from 10Hz to 2MHz，valtage is from 100μV to 400V. The meter use low-noise and lineal special measure 4 digit digital display. So it features high precision, small frequency response error, high input impedance, no zero-adjusting need when switching the range of measurement. LCD is used to provide digital readings visible even in bright locations. Ease of use. (easy-to-read digital display) It is especially applied to the college and university.