SE1201 Small-sized Digital Lock-in Amplifier provides an excellent performance within its bandwidth from 50 mHz to 120 kHz. With the high-speed 4-core architecture, high-precision ADC and excellent analog performance, SE1201 can easily detect the phase and the magnitude of weak signals overwhelmed by various large noise. The performance of SE1201 is as good as other lock-in amplifiers brands, even better in some certain parameters, such as measurement accuracy, operating bandwidth, which meets the needs of scientific research and industrial application well.