Gravity Sensor: Built -in 3-axis impact sensor (impact, sudden brake, sudden start). Rear: HD dedicated CMOS Sensor. - Video Compression: H.264 (mp4 format). - Audio: Built-in speaker, Microphone. - Size & Weight: Front: 100 X 101 X 33.3 (mm), 125g, Rear: 51.2 X 29.7 X 25.6 (mm), 22g.
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