I've got one of these, can't fault it, it has no screen but that dunt matter. U need a micro SD card, max 32gb. It records until full and then just writes back over top. It's only downside is u need to have it on charge most of time as it only lasts about 2 hours but most are like that anyway Look at this on eBay http://www.ebay.co.uk/itm/162090422973