Microcontroller-operated functions. Operating temperatures from -20°C to +50°C. FSK modulation and carrier frequency 869.8 MHz. LED indication of operating status, low battery and transmission feedback. IP67. Floating. Also working with rechargeable batteries. Keyboard backlighting by means of LEDs. According to directive 2014/53/EU (RED). - Microcontroller-operated functions - Operating temperatures: -20°C to +50°C - FSK modulation, carrier frequency: 869.8 MHz - LED indication: operating status, low battery, transmission feedback - IP67 protection - Floating design - Compatible with rechargeable batteries - LED keyboard backlighting - Compliance: Directive 2014/53/EU (RED)