Product colour : Black Internal : No Storage relative humidity (H-H) : 5 - 90% Storage temperature (T-T) : -40 - 70 °C Operating relative humidity (H-H) : 10 - 90% Operating temperature (T-T) : 0 - 40 °C Bluetooth : Yes Bluetooth frequency band : 2402 MHz - 2480 MHz Bluetooth version : 5.4...