... Operating Temperature: 0 ° C - 55 ° C2, probe wireless transmission console: Size: 150 * 80 * 100MM Wireless transceiver frequency: 2.4GHZ, 4 channels (2414MHZ, 2432MHZ ... : USB 2.0 Video output format: NTSC & PAL, AV-OUT Wireless Receiver Frequency: 2.4GHZ, 4 channels (2414MHZ, 2432MHZ, 2450MHZ, 2468MHZ ...