| MB 39D Screen Display | |
| Frequency | 433.92MHz |
| power supply | DC59V/2A |
| humidity | 10 – 80 % |
| temperature | 0 – 45 ˚ |
| Dimension | 32cmx16cmx4cm |
| MB 39K Keyboard | |
| Frequency | 433.92MHz |
| cALLING mODE | Button |
| Voltage | DC5V-9V |
| Range | 200 m |
| Dimension | 10cmx14cm |
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