Caranya : 
- Transmitter diletakkan di tempat pemantauan 
- Plug earphone ke receiver utk mendengarkan dari jarak 200m 

Features : 
- Built in high sensitive knowles microphone 
- Built in 3V CR2032 Li-ion socket 
- Up to 200m transmitted range 
- Built in antenna 
- Easy to operate 

Spec : 
- Output power : 3dbm 
- Modulation : WFM 
- Frequency : 433Mhz +/- 3Mhz 
- Microphone : Internal [Knowles mic] 
- Antenna : 180mm 
- Voltage : 3Vdc CR2032