Receiver Specification Frequency: ISM 2,400 - 2,483MHz Antenna: Omni-directional antenna Channel: 1-4 (Flip-type switch) Intermediate Frequency: 480MHz Frequency Stabilization: +/- 100KHz Demodulation Mode: FM Receiving Sensitivity: <=-85dBm Video Output: 1Vp-p@75 ohm, S/N>38dB Audio Output: 1Vp-p@600 ohm Power:DC 6V ;Built-in Li-battery. Operating Temperature: -10oC ~ +40oC Operating Humidity: 85%RH Packing Gift Box Size : cm Carton Box Size: cm 1 gift box : 1 Unit 1 Carton Box :20 sets Gross Weight : kg/ carton Net weight : kg/Carton