DC power supply 1.well protection function 2.High accuracy ... stability 3.low noise and ripple 4.ISO9001-2000,CE DC power supplyFeaturesSmall volume, light weightPWM modulation, for lower consumed ... very low temperature coefficient.Low noise, low ripple.High-gain amplifier circuit design, with a good rapid response characteristics. ... EnviromentTemperature: -20°C~70°C Humidity: 10%~90% RH DC power supply