VIOFO's top of the line 2-channel system offers 4K front recording and 1080P rear recording. Significantly cheaper than other 4K cameras on the market, the A129 Pro offers incredible video quality by pushing the boundaries in terms of bitrate. A hidden H.265 option is also available for those concerned with memory usage. Dual band 5GHz WiFi also helps significantly for download speeds as file sizes can get quite large.