i use a veho muvi and its excellent for my MTB bike
they are available from amazon etc and are around £40
so far for me bullet proof !!! and ive had a few offs !! LOL
HTH
tony
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MUST..... GO...... FASTER !!!! 
TC-Corally RDX PHI
OFFROAD-LRP S10 BX
WGT-Serpent S100
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