HoryzonHD is the first and probably the best HD cam especially designed for FPV purpose.It features 1080p full HD onboard video recording, very light weight(only 38g), high definition PAL/NTSC AV out,960x 420 resolution monitor and so on.
The sensor module is connected with the main board module by 20cm HDMI wire,so this gives you a lot of possibilities that you couldn't find on other HD cam like Gopro.
Lens: 120 degree wide angle. (140 degree with Gopro lens)
Sensor: 5.0 Megapixels CMOS
1440x 1080 30fps
Photo resolution: 2592x1944
Video formate: H.264 encoding
Audo: built-in Microphone
Memory: Support Micro SD card(TF card) up to 32 GB
Power supply: 5V DC(5-28V through V-reg)