Name: 2.4GHz Wireless DVR System Model: PST-DVR-W02 Features: 2.4GHz Wireless Video Recorder. 4 channel operation. Auto motion detection and recording. Support SD card 2G. Description: 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: less than -85dBm Video Output: 1Vp-p, 75 ohm, S/N>38dB Audio Output: 1Vp-p, 600 ohm Power: DC 5V Operating Humidity: 85%RH