Shenzhen Alersec Technology Co.,Ltd focus on vehicle field for many years ,now has been one of the professional vehicle products supplier to the world .From 2010 year we always insist on innovation professional as our purpose .we focused on vehicles' R&D,production and sales ,Now we produce Mobile DVR ,Vehicle Cameras,Car recorder etc products .You can know about us through www.alersec.com  or you can add skype :zlqalvin-2008 .