... brightness 4.Long life 7 segment LED digit display in blue color 4 digit Specifications: Size: 0.39 inch Voltage: ... 2.8-3.6V Wavelength: 462-470nm Various colors: blue, green, yellow and more Spec: Package: Application: Various colors ... of equipment/machine, smart mater, electronic balance, microwave oven, induction cooker etc. Features: High luminous intesity output, Low power consumption, ...