AD585 is a specially designed voltage reference module, it uses low-temperature drift components, Type C 5V port as power supply, uses filter to make the power supply purer and smoother, no need battery to supply power. This AD585 voltage reference module is cheaper than AD584JN, but as good as AD584JN. Product Name: AD585 voltage reference module No-load power consumption: 45mA Power supply: Type C 5V port, 0.5A Power supply indication: Green LED light Reference Voltage: 1.24V/2.5V/7.5V/5V/10V 5 levels. Reference Resistance: 10/100/1K/10K/100K 5 levels. Resistor's material: 0.1%Metal film copper Feet&:25PPM Working environment: 16-30 RH70% Product Usage: 1. Used to verify the accuracy and linearity of handheld 3 1/2 digital multimeters. 2. Used to verify the accuracy and linearity of handheld 4 1/2 digital multimeters, must keep the same temperature and humidity as the data sheet specified. Caution: 1. The pull switch can only keep one ON each time, no two ON allowed at the same working time. 2. If U like to verify the accuracy and linearity of handheld 4 1/2 digital multimeters, try to keep the same temperature and humidity as the data sheet specified. 3. Try to verify in a low air flow environment, try to avoid direct cold wind from the air conditioner as it may cause some additional errors. Colour: Material:PCB+electronic components Package Contents: 1 x Voltage Resistance Reference Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.