AD585 is a specially designed voltage reference module, it uses low-temperature drift components, Type C 5V port as power supply, uses EMI filter to make the power supply purer and smoother, no need battery to supply power. 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 Clear box size: 85X55X25mm 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&TCR:25PPM Package include: a piece of data sheet+AD585 voltage reference module+clear box Package net weight: 34g Working environment: 16-30 RH70% This AD585 voltage reference module is cheaper than AD584JN, but as good as AD584JN. 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. Package: 1pcs unique testing sheet+ 1* AD585 module+1* clear box