PC Wireless 4 Camera DVR Security Surveillance System 2.4G 4-Channel Wireless Surveillance and Security System Package includes: 1 x RC530A receiver 4 x CM801CWAS camera 5 x Power adapter 5 x AV cable 1 x Manual Receiver specs:Frequency: 2,400-2,483MHz. Intermediate frequency: 480MHz Video output: 1Vp-p/75ohmAudio output: 1Vp-p/600ohm Antenna: 50ohm SMA (Note: This item doesn't include a PCI DVR.You may need to buy it extra if you want to connect it to your PC.)