Features: Helmet camera ( with camera clip to helmet); Especially used for outdoor sports; 1/4 or 1/3 Sharp color ccd camera Specifications: Image sensor:1/4 or 1/3 sharp color ccd effective pixels: PAL:512(h)*582(v) NTSC:512(h)*492(v) Horizontal resolution:420tvl Minimun illumination:0.5 lux/f=2 ( 0 lux when lens:3.6mm/6.0mm(optional) S/n ratio:48db (agc-off) Signal system: PAL/NTSC Shutter speed:1/50(60)-1/100000(second) Video output: Rca/bnc,1.0vp-p,75 ohm Power supply: DC 9v-12v Operating temperature: -20 to + 60 degrees Storage temperature: -30 to + 80 degrees Size:25mm*74mm (ccd) Audio Function: Optional