General description This Seav BE Happy RH2 is a 2 Channel Rolling Code Transmitter operating on a frequency of 868Mhz. It is important to note that this model should not be confused with the similar-looking Seav Be Happy S2 or Seav Be Happy RS2. Technical specifications Frequency: 868Mhz Battery: 1 x CR2032 Dimensions: L - 6.3cm, W - 3.2cm, D - 1cm