1) frequency range: 2.4GHz-2.5Ghz

2) modulation mode: GMSK

3) frequency response: 20-20KHz

4) separation: >70dB

5) dynamic range: 88dB

6) THD: <=0.5%

7) S/N Ratio:  95 dB

8) receive sensitivity: -83dBm

9) transmission range: 55 meters

10) FM radio function

11) Two power supply choice: built-in Li-ion battery and AAAx2 normal batteries