Composition of the serial number: The third letter of the serial number indicates the year of manufacture: M = 2019, N = 2020, P = 2021, R = 2022, S = 2023, T = 2024, U = 2025, W = 2026,
X = 2027, Y = 2028, Z = 2029, etc. (letters G, I, O and Q are not used)
Example: Serial number ARMB-0001: The third letter is M, i.e. the device was manufactured in 2019.